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14-11-2018
Mathematics

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A swimming pool is open for 7 1/2 hours a day. Each lifeguard will stay on duty for 1 1/2 hours. How many lifeguards will be needed for one day?

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14-11-2018

7+1/2hours=15/2hours

1+1/2=3/2

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

5 lifeguards needed there

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