Aptitude:: Time and Work

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A can finish a work in 18 days and B can do the same work in 15 days. B worked for 10 days and left the job. In how many days, A alone can finish the remaining work?

A. 5 B.

C. 6 D. 8

Answer: Option C

Explanation:

 

B's 10 day's work = ( 1 x 10 ) = 2 .
15 3

 

Remaining work = ( 1 - 2 ) = 1 .
3 3

 

Now, 1 work is done by A in 1 day.
18

 

Therefore 1 work is done by A in ( 18 x 1 ) = 6 days.
3 3

 


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