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Mathematics, 08.04.2021 02:50 coolkiddKC

One pump can fill a tank of water in 5 hours. A second tank can fill the same tank in 4 hours. If both pumps are used together, how long will it take to fill the tank? 4/5 hours
20/9 hours
9/20 hours
5/4 hours

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One pump can fill a tank of water in 5 hours. A second tank can fill the same tank in 4 hours. If bo...

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