Question

Tap 1 and tap 2 can independently fill an empty swimming pool in 30 min and 40 min, respectively. Similarly, Drain plugs D1 and D2 can
independently drain the same pool fully in 30 min and 20 min, respectively. When the pool is full with stale water, what is the minimum time
required to fill half of it with fresh water?

Answer 1

Answer:

idk

Step-by-step explanation:

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