Time & Work / Pipes — practice questions, page 3
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An inlet fills a school's sump in 8 hours, but a crack would empty the full sump in 40 hours. If…Two pipes A and B can fill a tank in 20 minutes and 30 minutes respectively. Both are opened…Pallavi can finish a report in 24 days and Rahim in 36 days. They work together for 9 days, then…A is twice as efficient as B, and together they finish a piece of work in 12 days. In how many…Rafiq can tile a courtyard in 44 days and Dinesh can tile it in 66 days. If they work as a team,…Leela can stitch a batch of uniforms in 18 days and Mohan in 24 days. They work together for 6…A is twice as efficient as B. Working together they finish a piece of work in 12 days. How many…Kiran and Sohan together whitewash a hostel in 24 days. Kiran by herself would take 40 days. How…Two taps fill a school's water tank, one in 12 hours and the other in 60 hours. Running together,…A garden water tank fills through its pipe in 15 hours, but a hole at the bottom would empty it in…Two pipes can fill a tank in 20 minutes and 30 minutes respectively. Both are opened together, but…One tailor can stitch an order of school blazers in 15 days and a second tailor in 35 days. If…A can do a piece of work in 20 days and B in 30 days. They work together for 6 days. What fraction…A is twice as efficient as B. A takes 10 days less than B to complete a work. In how many days can…Manoj and Farah together paint the school boundary wall in 28 days; Manoj alone needs 44 days. How…A borewell pump fills a rooftop tank in 11 hours, but a cracked valve can drain the full tank in…Filling an irrigation tank takes 27 hours with the canal inlet alone and 54 hours with the…An inlet fills a factory's coolant tank in 8 hours, while an outlet empties the full tank in 20…A fire-station reservoir has two inlets: one fills it in 30 minutes, the other in 70 minutes. If…Leela can stitch a batch of curtains in 24 days and her assistant Kiran in 56 days. How many days…Gopal can whitewash a school building in 16 days and Irfan in 48 days. They start together, but…Lata works three times as fast as Gita. Together they finish a sewing order in 15 days. How many…An inlet pipe can fill a cistern in 12 hours and an outlet can empty the full cistern in 28 hours.…Two carpenters, Salim and Joseph, can each make a set of wardrobes alone in 52 days and 78 days…Usha alone can bind a set of registers in 18 days and Faisal alone in 27 days. They work on it…
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