A) 7.5 days
B) 6.5 days
C) 5.5 days
D) 4.5 days
Represent man by A and son by B
A’s 1 day work = 1/5
(A+B)’S 1 day work = 1/3
Son alone can do the work in 15/2=7.5 days
Related MCQs:
- X and Y can do a piece of work in 20 days and 12 days respectively. X started the work alone, and then after 4 days, Y joined him until the completion of the work. How long did the work last?
- If A and B together can complete a piece of work in 15 days and B alone in 20 days, in how many days can A alone complete the work?
- A is twice as good as workman as B and together they finish a piece of work in 18 days. In how many days will B alone finish the work?
- If A and B together can complete a job in 15 days and B alone can complete it in 20 days. In how many days can A alone complete job: