Bank Exam
Government Jobs Exams
Numerical Ability
Time and Work
A can do a piece of work in 30 days . he works at it for 5 days and then b finish it in 20 days in what time a and b togehter do it
Read Solution (Total 1)
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- A's 1 day work = 1/30
A's 5 day work = 5 * 1/30 = 1/6
Remaining work = 1-1/6 == 5/6
B done 5/6 of work in 20 days
Then B ll finish the whole work in
6/5 * 20 == 24 days
A ll finish d work in 30 days
B ll finish d work in 24 days
A + B's 1 day work is
1/30 + 1/24 = 54/720 = 3/40
A + B together ll finish in 40/3 days
(ie) 13 1/3 days
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