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 ?  Choose the correct choice from the following:	A) 712days	B) 612days	C) 512days	D) 412days	E) None of these
Explanation:   In this type of question, where we have one person work and together work done. Then we can easily   get the other person work just by subtracting them. 712dayss   Son's one day work =   (13−15)=(5−315)=215   So son will do whole work in 15/2 days   which is =   712days   712daysnswer: 712days
<result>A</result>
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 ?