Question

A and B can do a piece of work in 10 days and 15 days respectivily. They work togather for 3 days and then B leaves. Then how many days
take to finish the remainig work by A ?​

Answer 1

Answer:

Step-by-step explanation:

A&B together can do the work in = 1/10 + 1/15 =   3 + 2 / 30 = 5/30 = 1/6.

A& B together can do the work in 6 days.

Given, A & B worked together for 3 days, before B leaves.

So amount of work completed in 3 days = 3 * 1/6 = 1/2 part of work.

Amount of work left over = 1 -1/2 = 1/2 part of work.

The time taken by A to complete remaining work = 1/2 * 10 = 5 days.