Question

A new development has 105 houses, all same size. if Evan can paint a house in 4 days and Joel can paint a house in 3 days, how many weeks will it take them working together to paint all 105? A normal work week is 5 days.

Answer 1

How much of a house can they paint in a day?
1/4 + 1/3 = 7/12

So, at 7/12 house per day

105 / (7/12) = 180 days = 36 weeks