Question

A can finish a piece of work in 15 days and B can do it in two days they worked together for 2 days and then B went away in how many days will a finish the remaining work

Answer 1

Let a complete work be as 1.

A complete work in 25 days,

So in 1 day, A do work = 1/25

B complete work in 20 days,

So in 1 day, B do work = 1/20

In 5 days both do work = 5*(1/25)+5*(1/20) = 1/5+1/4 = 9/20

So 9/20 work is completed in 5 days.

Now, remaining work=1–9/20 = 11/20

So B will complete work in = (11/20)/(1/20)=11 days

Answer 2

A finish after 13day and b finished in 2day