A father and his son can build a tree house in 6 days. Son can build the same tree house in 12 days. Find how many days father will take to build 3/4 of the house.
1
11 days
2
7 days
3
5 days
4
9 days
5
None of these
A father and his son can build a tree house in 6 days. Son can build the same tree house in 12 days. Find how many days father will take to build 3/4 of the house.