Question

2. A and B can do a piece of work in 10 days, B and C can do it in 15 days and A and C can do it in 20 days. How long will they take to do it together and individually?
the answer is in pic ​

Answer 1

Answer:

Step-by-step explanation:

A and C can do it in 15 days. How long will A take to do it alone? ∴ A alone will complete the work in 24 days.

Answer 2

Answer:

A and C can do it in 15 days. How long will A take to do it alone? ∴ A alone will complete the work in 24 days. Hence option [B] is correct answer.