SOLUTION: Mary can roof her house in 7 days working alone. Her husband can roof their house in 14 days working alone. How long will it take them to roof their house if they work together?

Algebra ->  Rate-of-work-word-problems -> SOLUTION: Mary can roof her house in 7 days working alone. Her husband can roof their house in 14 days working alone. How long will it take them to roof their house if they work together?       Log On