Mathematics, 17.07.2020 17:01 tinytoonjr6901

One pump can drain a pool in 8 minutes. when a second pump is also used, the pool only takes 4 minutes to drain. how long would it take the second pump to drain the pool if it were the only pump in use

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One pump can drain a pool in 8 minutes. when a second pump is also used, the pool only takes 4 minut...