Question

A swimming pool's large drain will empty the pool in 3 hours while its smaller drain takes 6 hours. If both drains are opened, how long will it take to empty the pool?

Answer 1

1.5 hours

Step-by Step Explanation:

the smaller drain takes 2x as long by itself then the bigger drain, so it will be 2x as quicker if both are opened.

Answer 2

2 hours

Explanation:

6 divided by 3 is 2

Im pretty sure this is correct :)