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Two pumps are filling a pool. The first pump is filling the pool 330 liters hourly, while the second pump is filling quarter of the pool in 4 hours. How many hours would it take the two pumps to fill in the pool full together, if the pool's capacity is 1760 litres?

 Mar 1, 2020
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1/4 of the pool per 4 hours  hour is    1/4 * 1760 l/ 4hr = 110 l/hr

 

110 + 330 = 440 L/HR

 

1760 L  /  440 L/HR = 4 hours

 Mar 1, 2020

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