Question

Aman can do a piece of work in 20 days, Aman and Chandrakant together can do the same work in 15 days.
Aman. Bharat and Chandrakant together can complete the same work in 10 days. In how many days Bharat
and Chandrakant together can complete the same work?
​

Answer 1

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————»20 Days«————

REFER TO THE ATTACHMENT

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Answer 2

Given,

The work can be done by one person = for 20days.

The days two people took to complete work = 15days.

Three people took 10days to finish the same work.

To Find,

The number of days Bharat and Chandrakant together take to finish the job.

Solution,

Given that,

There are three people.

Out of three Aman can complete work in20days.

And,

Aman and Chandrakant finsih work in 15days.

Three of them together take 10days

Let's denote,

Aman =A

Bharat = B

Chandrakant = C

A taking days = 20

One day work done by A = $\frac{1}{20}$

A+C taking days = 15

One day work done by and C = $\frac{1}{15}$

A, B, C taking days

A+B+C = 10

And, one day work done by them= $\frac{1}{10}$

So,

The work done by B and C,

Here,

A+B+C =$\frac{1}{10}$

A = $\frac{1}{20}$

B+C = $\frac{1}{10} - \frac{1}{20}$

B+C = $\frac{1}{20}$.

Hence, Bharat and Chandrakant together can finish the work in 20days.