A and B alone, can do work in 35 and 28 days. After 20 days, A leaves the work. In how time the work will finish?
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Answer:
32 days
Step-by-step explanation:
T.W = LCM(35,28)= 140 units
their efficiency
A => 140/35 = 4 units/day
B = 140/28 = 5 units/day
A's 20 days work = 20 × 4 = 80 units
remaining work = 60 units
B will do remaining work in
= 60/5 = 12 days
work will be finished in
= 20 + 12 = 32 days
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