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Faucet A flows at a rate of 100 liters per 5 minutes and Faucet B flows at a rate of 100 liters per 4 minutes into an empty pool. How many minutes do the two faucets take to fill a pool with 9,000 liters of water?

 Sep 13, 2020
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A rate = 100 l  / 5 min =   20 l/min

B rate = 100/4 = 25 l/min                        combined = 45 liters per minute

 

9000 l  /  45 l/ min = 200 min

 Sep 13, 2020

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