Answers

2014-02-26T10:58:38+05:30
(A + B)'s 1 day's work = 1/20 + 1/25 = 9/100

Work done by A and B in 10 days = (9/100 x 10) = 9/10

Remaining work = (1 - 9/10) = 1/10

Now, 1/20 work is done by A in 1 day.

so, 1/10 work will be done by A in (1/10 x 15) = 1.5 days

Hence, the total time taken = (1.5 + 10) = 11.5 days



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2014-02-26T15:15:12+05:30
B will be complete in 2.5 days
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