Question

(1)There are two persons namely A and B. A works twice as fast as B. They work together and complete a job in 8 days. How long would A take to complete the job?
(2) A and B can do a job in 25 days. After 15 days of working together B leaves. If A completes the remaining part of the job in 20 days, how long would each take to complete the job, working separately?

Please give the solution as soon as possible. It's urgent.

Answer 1

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Answer 2

1)

GIVEN :-

A works twice as fast as B

They work together to complete job in 8 days.

TO FIND :-

Time taken by A to complete the job.

SOLUTION :-

Let A took 'x' days to complete the job.

Time taken by B = 2x days.

They work together and complete a job in 8 days.

(1/x) + 1/2x = 1/8

=> 3/2x = 1/8

=> 24 = 12x

=> x = 12

Hence, A takes 12 days to complete the job