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A, B and C can do a piece of work individually in 8, 12 and 15 days, respectively. A and B start working but A quits after working for 2 days. After this, C joins B till the completion of work. In how many days will the work be completed? |
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Answer» ` 5 8/8 days` ` =1/8 + 1/12 = 5/24` 2 day's work of A and ` B = 10/24` After 2 day's A left the work `therefoer` Remaining work `= 1 - 10/24=14/24` One day work of B and C toegther `= 1/12 + 1/15 = 9/60` So, the number of days required by B and C to finish work `=(14//24)/(9//60) = 14/24 xx 60/9 = 35/9` `therefore` Total days to complete the work `=2 + 35/9 = 53/9 = 5 8/9` days |
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