If A and B together can complete a piece of work in 15 days and B alone in 20 days, in how many days can A alone complete the work?
40 30 45 60
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211 Answers
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Vikrant
- 07 Sep
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take work arbitrarily 60. a+b --60/15=4 unit/day b--60/20=3 unit/day a--4-3=1 unit/day so for 60unit a will take 60 days
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Jay
- 02 Sep
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Let wrk = lcm of 15 n 20 dat is 60 B efficiency = 60/20=3 A+B efficiency = 60/15=4 A efficiency = 4-3=1 So A can do wrk alone in 60/1=60 days
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Chirag
- 31 Aug
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