Question

A can do a work in 6 days b can do it in 8 days.They worked together for 2 days and then b left the work. How many days will A require to complete the remaining work

Answer 1

A can do a work in 6 days b can do it in 8 days

amount of work A can do in 1 day = 1/6
amount of work B can do in 1 day = 1/8
amount of work A and B can do together in 1 day = 1/6 + 1/8 = 7/24

in 2 days, they do = 2× 7/24 = 7/12

work remaining for A to do alone = 1 - 7/12 = 5/12

no. of days A will take = 5/12 ÷ 1/6 = 5/2 days

Thus A needs 2.5 days to complete the work.

Answer 2

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