Q.

A can finish a piece of work in 18 days and B can do the same work in half the time taken by A. Then working to their what part of the same work they can finish in a day?

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a

2/7

b

2/5

c

1/6       

d

1/9       

answer is A.

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Detailed Solution

Given that the amount of work completed by A alone is 118

Since the time taken by B to complete the samee work is half of that of A

so that the amount of work completed by B alone is 218

Hence the amount of work completed by both together is 118+218=318=16

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