Question

Anuj and bhanu can together finish a work in 30 days . they worked together for 20 days and bhanu left . after another 20 days , Anuj finished the remaining work . in how many days anuj alone can finish the job?

Answer 1

In 20 days they have finished 20/30= 2/3 of work
The work left was 1-2/3=1/3
Anuj finished the work 1/3 work in 20 days
 Anuj would finish the whole work in 1*20/(1/3)=60 days.