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A swimming pool is open for 71/2 hours during the day the pool keeps one lifeguard on duty at a time, and each lifeguards shift is 11/2 hours long
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A swimming pool is open for 71/2 hours during the day the pool keeps one lifeguard on duty at a time, and each lifeguards shift is 11/2 hours long

User AndyL
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5 lifeguards are needed during the day
User Sujay S Kumar
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