If it takes 6 hour for 2 people to clean a house, how many hours will it take 4 people working at the same rate, to clean another house that is the same size?

Question

1.) 2/3

2.) 1 1/2

3.) 2

4.) 3

Answer 1

Assuming the two people from before are working at the same rate, if it takes 6 hours for 2 people to clean a house, then it should take half as much time for 4 people to clean the same house, since those people work twice as fast. That means that it should take 3 hours.