Grade 12th pass8 grade maths
A can do a certain job in 25 days which B alone can do in 20 days. A started the work and then joined by B after 10 days. In how many days was the whole work completed?
A can do a certain job in 25 days which B alone can do in 20 days. A started the work and then joined by B after 10 days. In how many days was the whole work completed?
