Time & Work / Pipes — practice questions, page 4
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18 labourers can lay a village road in 28 days. If 24 labourers are put on the job, all working…P is 50% more efficient than Q. Together they complete a task in 18 days. How many days would P…A borewell pump fills a farm tank in 34 hours, but a faulty valve can empty the full tank in 51…A tap alone fills a sump in 11 hours, but because of a leak the sump takes 13 hours to fill. How…Pipes P and Q fill a tank in 24 minutes and 36 minutes respectively. Both are opened together, Q…A is twice as efficient as B, and together they finish a piece of work in 12 days. In how many…15 workers can build a wall in 8 days. How many workers are needed to build the same wall in 6 days?A cistern on a terrace fills through one inlet in 45 minutes and through a second inlet in 90…Normally a tap fills a tank in 14 hours, but because of a leak it now takes 18 hours. Working…Two pipes A and B can fill a tank in 10 hours and 15 hours respectively. Both are opened together,…Asha can whitewash a hall in 13 days and her brother can do it in 52 days. How many days will they…Working together, Deepak and Manoj can tile a floor in 16 days. Deepak alone would need 24 days.…A is twice as efficient as B. Working together they can finish a work in 12 days. In how many days…Varun alone can build a boundary wall in 24 days. He works on it for 8 days and leaves; Prakash…Of two garden taps, one fills a water barrel in 7 hours and the other in 21 hours. With both taps…Filling a water tanker takes hose P 34 minutes and hose Q 51 minutes. Using both hoses together,…Taps X and Y can fill a tank in 18 minutes and 27 minutes respectively. Both are turned on, and…A can do a work in 20 days and B in 30 days. They work together for 5 days and then stop. What…A is twice as efficient as B, and together they finish a work in 12 days. In how many days can A…Working together, Tara and Usha can stitch a large order of school uniforms in 30 days. Tara alone…An inlet fills a school's water tank in 26 hours and an outlet empties the full tank in 39 hours.…Working alone, one inlet fills a hostel's overhead tank in 30 hours and another in 42 hours. With…A tap alone fills a cistern in 8 hours, but a crack at the bottom means it now takes 10 hours. How…An inlet fills an empty sump in 6 hours and an outlet empties the full sump in 14 hours. If both…A is twice as efficient a worker as B. Working together, A and B can finish a piece of work in 14…
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