Question

sally can paint a room in 3 hours while it takes steve 8 hours to paint the same room. how long would it take them to paint the room if they worked together ? ​

Answer 1

2 hours 11 minutes

Explanation:

Each hour Sally can paint 1/3 rooms, Steve can paint 1/8 rooms.

If they work together, each hour they can paint 1/3 + 1/8 = 11/24 rooms.

So They will take 1/(11/24) = 24/11 = 2.18 hours to paint a whole room.

2.18 hours = 2 hours 0.18*60 minutes

0.18 * 60 = 11

Answer: 2 hours 11 minutes