Paul can complete a project in 6 days. with the help of an intern, he can do it in 4 days.in what time can the intern complete the work alone.
a) 6 days
b) 6 1/4 days
c) 12 days
d) 12 1/2 days
"The gaming of numbers is called maths.So participate in this wonderful game and explore in it,learn in it and enjoy in it.Then only you can pass in this wonderful game."