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Mathematics, 28.01.2021 23:00 breashaeeboo1813

One faucet fills a sink in 4 minutes. A drain at the bottom of the sink can empty the sink in 5 minutes. If the faucet is turned on and the drain is open, how many minutes will it take to fill the
sink? Enter ONLY the number.

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One faucet fills a sink in 4 minutes. A drain at the bottom of the sink can empty the sink in 5 min...

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