Question

A can do a piece of work on 10 days and b can do the same work in 20 days.They start the work together,but after 5 days a leaves.By will do the remaining piece of work in

Answer 1

1 day work of A=1/10

1day work of B=1/20

one day work together=1/10+1/20=3/20

5 days work together=3/20×5=15/20

work remaining=5/20

B will do in 5/20÷1/20=5