Problem
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running at their respective constant rate , machine x takes 2 days longer to produce w widgets than machines y . at these rates , if the two machines together produce 5 w / 4 widgets in 3 days , how many days would it take machine x alone to produce 2 w widgets .
0general
how long will a boy take to run round a square field of side 60 meters , if he runs at the rate of 9 km / hr ?
2gain
a 60 cm long wire is to be cut into two pieces so that one piece will be 2 / 4 th of the other , how many centimeters will the shorter piece be ?
1physics
a boat running up stram takes 6 hours to cover a certain distance , while it takes 8 hours to cover the same distance running down stream . what is the ratio between the speed of the boat and the speed of water current respectively ?
1physics
if a book is sold at 9 % profit instead of 9 % loss , it would have brought rs 9 more . find out the cost price of the book
2gain
a metallic sheet is of rectangular shape with dimensions 48 m x 36 m . from each of its corners , a square is cut off so as to make an open box . if the length of the square is 8 m , the volume of the box ( in m cube ) is :
3geometry
aarti can do a piece of work in 6 days . in how many days will she complete three time of work of same type ?
1physics
a man bought an article and sold it at a gain of 5 % . if he had bought it at 5 % less and sold it for re 3 less , he would have made a profit of 10 % . the c . p . of the article was
2gain
the average ( arithmetic mean ) of 4 positive integers is 45 . if the average of 2 of these integers is 45 , what is the greatest possible value that one of the other 2 integers can have ?
0general
if the arithmetic mean of p and q is 10 and the arithmetic mean of q and r is 20 , what is the value of r - p ?
0general
a woman invested $ 1,000 , part at 5 % and the rest at 6 % . her total investment with interest at the end of the year was $ 1,052 . how much did she invest at 5 % ?
2gain
one ball will drop from a certain height . the height it will reach after rebounding from the floor is 50 percent of the previous height . the total travel is 260 cm when it touches the floor on third time . what is the value of the original height ?
2gain
16.02 ã — 0.00001 = ?
0general
a distributor sells a product through an online store , which take a commission of 20 % of the price set by the distributor . the distributor obtains the product from a producer at the price of $ 17 per item . what is the price that the buyer observers online if the distributor wants to maintain a 20 % profit on the cost of the item ?
2gain
when working alone , painter w can paint a room in 2 hours , and working alone , painter x can paint the same room in a hours . when the two painters work together and independently , they can paint the room in 3 / 4 of an hour . what is the value of a ?
1physics
the total age of a and b is 10 years more than the total age of b and c . c is how many years younger than a ?
0general
a new tower has just been built at the verbico military hospital ; the number of beds available for patients at the hospital is now 5 times the number available before the new tower was built . currently , 1 / 3 of the hospital ' s original beds , as well as 1 / 5 of the beds in the new tower , are occupied . for the purposes of renovating the hospital ' s original wing , all of the patients in the hospital ' s original beds must be transferred to beds in the new tower . if patients are neither admitted nor discharged during the transfer , what fraction of the beds in the new tower will be unoccupied once the transfer is complete ?
0general
what is the probability of having 53 fridays in an ordinary year
4probability
how many integerskgreater than 100 and less than 900 are there such that if the hundreds and the units digits ofkare reversed , the resulting integer is k + 99 ?
0general
how many halves are there in 9 - fourth ?
0general
what is the population standard deviation for the numbers : 75 , 83 , 96 , 100 , 121 and 125 ?
0general
63 small identical cubes are used to form a large cube . how many more cubes are needed to add one top layer of small cube all over the surface of the large cube ?
3geometry
there are two tanks a & b with same capacity of 20 litres . if the water inflow rate ( speed ) in tank a is 2 litres per hour & in tank b is 4 litres per hour . how much longer tank a takes to fill than tank b ?
1physics
while calculating the edge of a square , a worker makes an error of 2 % in excess . what % error does he make in calculating area ? ( % )
3geometry
how many positive integers less than 200 are there such that they are multiples of 13 or multiples of 12 ?
0general
if a / b = 1 / 2 , b / c = 5 , c / d = 2 / 3 , d / e = 1 / 6 and e / f = 2 / 3 , then what is the value of abc / def ?
0general
a salesperson received a commission of 3 percent of the sale price for each of the first 100 machines that she sold and 4 percent of the sale price for each machine that she sold after the first 100 . if the sale price of each machine was $ 10,000 and the salesperson received a $ 40,000 commission , how many machines did she sell ?
2gain
find the average of all the numbers between 6 and 30 which are divisible by 4 .
0general
in a renowned city , the average birth rate is 8 people every two seconds and the death rate is 6 people every two seconds . estimate the size of the population net increase that occurs in one day .
0general
in 1970 there were 8,902 women stockbrokers in the united states . by 1978 the number had increased to 24,947 . approximately what was the percent increase ?
0general
in may , the groundskeeper at spring lake golf club built a circular green with an area of 70 π square feet . in august , the groundskeeper doubled the distance from the center of the green to the edge of the green . what is the total area of the renovated green ?
3geometry
find the cost of fencing around a circular field of diameter 30 m at the rate of rs . 5 a meter ?
1physics
if x # y is defined to equal x ^ 2 / y for all x and y , then ( - 1 # 2 ) # - 3 =
0general
39 persons can repair a road in 12 days , working 5 hours a day . in how many days will 15 persons , working 6 hours a day , complete the work ?
1physics
let f ( x ) = x ^ 2 + bx + c . if f ( 1 ) = 0 and f ( - 5 ) = 0 , then f ( x ) crosses the y - axis at what y - coordinate ?
0general
the circumference of the front wheel of a cart is 30 ft long and that of the back wheel is 40 ft long . what is the distance traveled by the cart , when the front wheel has done five more revolutions than the rear wheel ?
1physics
a leak in the bottom of a tank can empty the full tank in 6 hours . an inlet pipe fills water at the rate of 4.5 liters per minute . when the tank is full in inlet is opened and due to the leak the tank is empties in 8 hours . the capacity of the tank is ?
1physics
a and b invests rs . 10000 each , a investing for 8 months and b investing for all the 12 months in the year . if the total profit at the end of the year is rs . 5000 , find their shares ?
2gain
a circular path of 12 m radius has marginal walk 2 m wide all round it . find the cost of leveling the walk at 50 p per m 2 ?
1physics
last year sandy saved 6 % of her annual salary . this year , she made 10 % more money than last year , and she saved 8 % of her salary . the amount saved this year was what percent of the amount she saved last year ?
2gain
the length of a rectangle is twice its breadth . if its length is decreased by 10 cm and breadth is increased by 10 cm , the area of the rectangle is increased by 75 sq . cm . what is the length of the rectangle ?
3geometry
factory x ' s bulbs work for over 5000 hours in 78 % of cases , whereas factory y ' s bulbs work for over 5000 hours in 65 % of cases . it is known that factory x supplies 90 % of the total bulbs available . what is the chance that a purchased bulb will work for longer than 5000 hours ?
1physics
7 years ago , paula was 3 times as old as karl . in 2 years , paula will be twice as old as karl . what is the sum of their ages now ?
0general
a certain car dealership sells economy cars , luxury cars , and sport utility vehicles . the ratio of economy to luxury cars is 5 : 4 . the ratio of economy cars to sport utility vehicles is 3 : 2 . what is the ratio of luxury cars to sport utility vehicles ?
5other
a dress on sale in a shop is marked at $ d . during the discount sale its price is reduced by 65 % . staff are allowed a further 60 % reduction on the discounted price . if a staff member buys the dress what will she have to pay in terms of d ?
2gain
the difference of two numbers is 11 . one third of their sum is 7 . what are the two numbers ?
0general
75 % of 480 = ( ? ) x 15 ?
0general
if a truck is traveling at a constant rate of 54 kilometers per hour , how many seconds will it take the truck to travel a distance of 600 meters ? ( 1 kilometer = 1000 meters )
1physics
what number times ( 1 ⁄ 7 ) ^ 2 will give the value of 7 ^ 3 ?
0general
the ratio 2 : 10 expressed as percent equals to
0general
a watch was sold at a loss of 21 % . if it was sold for rs . 140 more , there would have been a gain of 4 % . what is the cost price ?
2gain
at a certain restaurant , the ratio of the number of cooks to the number of waiters is 3 to 8 . when 12 more waiters are hired , the ratio of the number of cooks to the number of waiters changes to 1 to 4 . how many cooks does the restaurant have ?
5other
a bag contains 5 green balls and 8 white balls . if two balls are drawn simultaneously , what is the probability that both balls are the same colour ?
5other
if 60 % of 3 / 5 of a number is 36 , then the number is ?
2gain
a sum of money amounts to rs . 9800 after 5 years and rs . 12005 after 8 years at the same rate of simple interest . the rate of interest per annum is ?
2gain
two years ago , ram put $ 1,000 into a savings account . at the end of the first year , his account had accrued $ 200 in interest bringing his total balance to $ 1,200 . the next year , his account balance increased by 20 % . at the end of the two years , by what percent has ram ' s account balance increased from his initial deposit of $ 1,000 ?
2gain
in a college , 1 percent of students hate math , 2 percent of students hate english , 1 percent hate french and 4 percent hate german . can you find out the percentage of students who hate all 4 subjects ?
2gain
walking at 6 / 7 th of his usual speed , a man is 25 mins too late . his usual time is
1physics
amit and ananthu can do a work in 15 days and 30 days respectively . amit started the work and left after 3 days . ananthu took over and completed the work . in how many days was the total work completed ?
1physics
if a - b = 3 and a ( power 2 ) + b ( power 2 ) = 39 , find the value of ab .
0general
a cylinder of height h is 2 / 3 of water . when all of the water is poured into an empty cylinder whose radius is 25 percent larger than that of the original cylinder , the new cylinder is 3 / 5 full . the height of the new cylinder is what percent of h ?
2gain
a and b together have $ 1210 . if of a ' s amount is equal to of b ' s amount , what is the ratio between a and b ?
5other
the ratio between the perimeter and the width of a rectangle is 5 : 1 . if the area of the rectangle is 294 sq . cm , what is the width of the rectangle ?
3geometry
express a speed of 108 kmph in meters per second ?
1physics
the ratio of the two natural numbers is 6 : 5 . if a certain number is subtracted to both the numbers , the ratio becomes 5 : 4 . if the larger number exceeds the smaller number by 5 , find the number subtracted ?
5other
200 is what percent of 50 ?
2gain
a big container is 30 % full with water . if 54 liters of water is added , the container becomes 3 / 4 full . what is the capacity of the big container ?
0general
at what rate percent per annum will the simple interest on a sum of money be 6 / 5 of the amount in 10 years ?
2gain
if x is real , find the maximum value of the expression - 2 x ^ 2 + 5 x + 7 .
0general
the perimeter of one face of a cube is 40 cm . its volume will be :
3geometry
a starts business with rs . 3500 and after 10 months , b joins with a as his partner . after a year , the profit is divided in the ratio 2 : 3 . what is b â € ™ s contribution in the capital ?
5other
if the personal income tax rate is lowered from 45 % to 30 % , what is the differential savings for a tax payer having an annual income before tax to the tune of $ 48000 ?
2gain
a trader sells 45 meters of cloth for rs . 4500 at the profit of rs . 12 per metre of cloth . what is the cost price of one metre of cloth ?
1physics
subash can copy 50 pages in 10 hrs . subash and prakash together can copy 300 pages in 40 hours . in how much time prakash can copy 10 pages .
0general
two trains are running in opposite directions in the same speed . the length of each train is 120 meter . if they cross each other in 16 seconds , the speed of each train ( in km / hr ) is
1physics
how much is 80 % of 60 is greater than 4 / 5 of 25 ?
0general
a 6 litre sol is 30 % alcohol . how many litres of pure alcohol must be added to produce a sol that is 50 % alcohol ?
2gain
a factory has three types of machines , each of which works at its own constant rate . if 7 machine as and 11 machine bs can produce 470 widgets per hour , and if 8 machine as and 22 machine cs can produce 600 widgets per hour , how many widgets could one machine a , one machine b , and one machine c produce in one 8 - hour day ?
1physics
can you find a 7 digit number which describes itself . the first digit is the number of zeros in the number . the second digit is the number of ones in the number , etc . for example , in the number 21200 , there are 2 zeros , 1 one , 2 twos , 0 threes and 0 fours .
1physics
what decimal fraction is 50 ml of a litre ?
1physics
gary ’ s gas station serves an average of 13 cars per hour on saturdays , 10 cars per hour on sundays , and 9 cars per hour on all other days of the week . if the station is open from 6 a . m . to 10 p . m . every day , how many cars does gary ’ s station serve over the course of a typical week ?
1physics
a man ' s speed with the current is 15 km / hr and the speed of the current is 2.5 km / hr . the man ' s speed against the current is
2gain
in what time will a train 100 m long cross an electric pole , it its speed be 144 km / hr ?
1physics
if r is a positive integer , and r / 15 = 8.2 , what is the remainder when r is divided by 15 ?
0general
working alone , printers x , y , and z can do a certain printing job , consisting of a large number of pages , in 15 , 12 , and 18 hours , respectively . what is the ratio of the time it takes printer x to do the job , working alone at its rate , to the time it takes printers y and z to do the job , working together at their individual rates ?
0general
what is the 20 - fifth decimal to the right in the fraction 10 / 11 ?
0general
one cutting machine cuts 100 metal bars in 30 minutes . another machine does the same job in 30 seconds . what time will it take if both machines are put on the same work ?
1physics
what is the average ( arithmetic mean ) of the numbers 16 , 17 , 17 , 18 , 19 , 19 and 20 ?
0general
the sum of 5 th and 21 th term of a . p . is equal to the sum of 8 th , 15 th and 13 th term . find the term which is 0
0general
what is 0.01 percent of 15,356 ?
2gain
evaluate : 12 + sqrt ( - 5 + 7 ã — 8 ã · 4 ) = ?
0general
in 5 football games thus far this season , barry has run for 98 , 107 , 85 , 89 , and 91 yards . at a minimum , how many yards n will he need to gain this sunday if he wants to keep his season average above 100 yards ?
0general
ab + cd = jjj , where ab and cd are two - digit numbers and jjj is a 3 digit number ; a , b , c , and d are distinct positive integers . in the addition problem above , what is the value of c ?
0general
8 friends went to a hotel and decided to pay the bill amount equally . but 7 of them could pay rs . 80 each as a result 8 th has to pay rs . 70 extra than his share . find the amount paid by him .
0general
if 4 men can colour 48 m long cloth in 2 days , then 8 men can colour 36 m long cloth in
1physics
a person lent a certain sum of money at 6 % per annum at simple interest and in 8 years the interest amounted to $ 572 less than the sum lent . what was the sum lent ?
2gain
a circular ground whose diameter is 35 metres , has a 1.4 metre - broad garden around inside of it . what is the area of the garden in square metres ?
3geometry
the edges of three metal cubes are 4 cm , 5 cm , and 6 cm respectively . a new cube is made by melting these three cubes together . what is the edge of the new cube ( in centimeters ) ?
1physics
mr . hernandez , who was a resident of state x for only 8 months last year , had a taxable income of $ 22,500 for the year . if the state tax rate were 10 percent of the year ’ s taxable income prorated for the proportion of the year during which the taxpayer was a resident , what would be the amount of mr . hernandez ’ s state x tax for last year ?
2gain
walking at 3 / 4 of her normal speed , a worker is 12 minutes later than usual in reaching her office . the usual time ( in minutes ) taken by her to cover the distance between her home and her office is
1physics