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Question 15 : Anil alone can do a job in 20 days while Sunil alone can do it in 40 days. Anil starts the job, and after 3 days, Sunil joins him. Again, after a few more days, Bimal joins them and they together finish the job. If Bimal has done 10% of the job, then in how many days was the job done?

- 13
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- 15
- 14

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Anil in one day can do ^{th} of the work

Sunil in one day can do ^{th} of the work

Anil starts the job and Sunil joins him after three days.

So, Anil would have done ^{th} of the work by the time Sunil joins

After Sunil joins, they both would be doing ^{th} of work everyday

Now, it is known that Bimal joins them after some days and finishes 10 % of the work.

Now, Anil alone had done ^{th} of the work and Bimal completes ^{th} of the work

So, in total they would have done = ^{th} of the work (is the work done by Bimal)

Remaining work = , which would be done by Anil and Sunil in 10 days.

Combining everything,

Total number of days = 3 + 10 = 13 days

The question is **"Anil alone can do a job in 20 days while Sunil alone can do it in 40 days. Anil starts the job, and after 3 days, Sunil joins him. Again, after a few more days, Bimal joins them and they together finish the job. If Bimal has done 10% of the job, then in how many days was the job done? " **

**Choice A** is the correct answer.

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