Solve the problem. See Example 3.Filling a Pool  An inlet pipe can fill Reynaldo’s pool in...

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