Question

Sally can paint a room in in 7 hours while it takes Steve 9 hours to paint the same room. How long would it take them to paint the room if the worked together?

Answer 1

Add their rates of working to get rate working together.

Explanation:

( 1 room/ Sally's time) + (1 room/ Steve's time) = (1 room) /( time working together. working together, they can paint the room in 4 hrs 14 min.