Question
A and B can complete a work in 15 days and 10 days re3spectively . They started doing the work together but after
2 days B had to leave and A alone completed the remaining work . The whole work was completed in
Answer: Option C
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(A + B)'s 1 days work = `(1/15 + 1/10) = 1/6`
work done by A and B in 2 days = `(1/6 xx 2) = 1/3` . Remaining work = `(1 - 1/3) = 2/3`
Now , `1/15` work is done by A in 1 day.
`:.` `2/3` work will be done by A in `(15 xx 2/3)` = 10 days.
Hence , total time taken = (10 + 2) = 12 days.
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