Question

A swimming pool is open for 7 1/2 hours a day. The pool kepps one lifeguard at a time and each lifeguard shift is 1 1/2 hous long. How many shifts are ther per day?

Answer 1

Let the number of shifts per day be x.

Accordingly,

`\begin{gathered} 1(1)/(2)x=7(1)/(2) \\ (3)/(2)x=(15)/(2) \\ 3x=15 \\ x=5 \end{gathered}`

Hence, the number of shifts per day is 5