Question

Jack can fill buckets of water four times fast as his sister Jill. They have to fill 400 buckets of

water for their village located at the bottom of a hill. Working together, Jack and Jill can complete
the job in six hours.
30. How many hours will it take Jack if he works alone?

Answer 1

7.2 hrs

Explanation:

Jack does 4/5 of the work in 6 hrs. He still needs to do 1/5 more if he's doing it by himself. 1/5 of 6 = 1.2 and 1.2 + 6 = 7.2 hrs

Answer 2

1.5 hour

Explanation:

You divide 6 by 4.