Solve the problem. See Example 3.Filling a Pool  Suppose Reynaldo discovered his error (se...

Solve the problem. See Example 3.

Filling a Pool  Suppose Reynaldo discovered his error (see Exercise 31) after an hour-long surf. If he then closed the outlet pipe, how much more time would be needed to fill the pool?

Exercise 31

Solve the problem. See Example 3.

Filling a Pool  An inlet pipe can fill Reynaldo’s pool in 5 hr, while an outlet pipe can empty it in 8 hr. In his haste to surf the Internet, Reynaldo left both pipes open. How long did it take to fill the pool?

EXAMPLE 3

SOLVING A WORK RATE PROBLEM