Question

2. A can do a piece of work in 30 days and B can do it in 20 days. They work
together for 4 days and then B leaves the job. In how many days, will A
finish the remaining work?​

Answer 1

Answer:

20 days

Step-by-step explanation:

working together they will finish work in (30×20)/50=12 days

so they wor together for 4 days so 4/12 ie)1/3 part of work is finished only 2/3 is remaining

so now time required to A to complete remaining work=2×30/3=20 days