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32 votes
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?

A swimming pool is open for 7 1/2 hours a day. The pool kepps one lifeguard at a time-example-1
User Martin Kunze
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1 Answer

20 votes
20 votes

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

User Mazrick
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