A man can do a piece of work in 5 days, but with the help of his son he can do it in 3 days. In what time can the son do it alone?

A. 7.5 days  B. 6.5 days C. 5.5 days D. 4.5 days

Read More!
#Mathematics_MCQs, #Past_PPSC_Papers, #PPSC_Past_Papers_2019_MCQs