Question

A and B can do a job together 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?​

Answer 1

Here is the answer mate

See the question says
A and B can do a job together in 25 days. After 15 days 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?

See if both A and B do work in 25 days so if B leaves then all the work is to be done by A
So it would take A double time to do the work so it should take 50 days to do the work instead of 25 days.

PLZ MARK ME THE BRAINLIEST IF MY ANSWER HELPS.

Answer 2

Step-by-step explanation:

(A+B)'s one day work = 1/25

amount of work completed in 15 days = 15×1/25

= 3/5

remaining work = 1-3/5 = 2/5

according to the question,

A finish the remaining 2/5 part of the work in 20 days.

therefore, time taken by A to finish the work alone = 20÷2/5 = 50 days

now,

A's one day work + B's one day work = (A+B)'s one day work

1/A + 1/B = 1/25

1/50 + 1/B = 1/25

1/B = 1/25-1/50

1/B = 1/50

therefore, time taken by B to complete the whole work = 50 days