Question

A swimming pool is open for 7\dfrac127 2 1 ​ 7, start fraction, 1, divided by, 2, end fraction hours during a day. The pool keeps one lifeguard on duty at a time, and each lifeguard's shift is 1\dfrac121 2 1 ​ 1, start fraction, 1, divided by, 2, end fraction hours long. How many shifts are there per day?

Answer 1

5

Explanation:

Answer 2

5 shifts

Explanation:

The pool is open for 7 1/2 hours (15/2 hours) per day.

Each lifeguard shift lasts for 1 1/2 hours (3/2 hours).

To get the number of shifts per day, we divide the total hours that the pool is open by the time of each lifeguard shift:

`(15)/(2) / (3)/(2) \\\\= (15)/(2) / (2)/(3) \\\\ = 5`

There are 5 lifeguard shifts per day.