Apool is being drained at a rate of 120 gallons per minute. what is this rate in quarts per hour?

 So,

120 gal./min.

There are 4 qt. in a gal.

Multiply 120 by 4.
120(4) = 480 qt.

The pool is being drained at a rate of 480 qt./min.

Now, since there are 60 min. in an hr., multiply 480 by 60.
480(60) = 28,800 qt./hr.

The pool is being drained at a rate of 28,800 qt./hr. (quarts per hour)