Question

A painter can paint 3 small rooms in the same time it takes him to finish 1 large room and 1 small room. It takes him 7 hours to finish a large room. Find the number of hours it takes the painter to finish a small room.

Answer 1

It's 3.5 hours. Or 3 hours and 30 minutes.

Explanation:

If the painting of 3 small rooms takes as much time as the painting of 1 large and 1 small rooms then it takes the same amout of time to paint 1 large room and 2 small rooms.

7 hours = 1 large room

1 large room = 2 small rooms

1 small room is half the time of a large room

1/2 of 7 = 3.5

3.5 hours is 3 hours 30 minutes.