Question

Riya can complete a piece of work in 5 days but with the help of her son she can do ith in 3 days.Find the time taken by the son alome to cplete the work

Answer 1

his son can do this work in 7 days because if with the help of her son it is completed in 3 days and without Riya 5-2=3, so,5+2=7.
so the son will take 7 days