Question

A tap can fill a tank in 20 hours while the other can empty it in 30 hours the tank be empty and if both taps are opened together how long will it take the tank to be harmful

Answer 1

the answer of this question is

1/20 - 1/30 = 1/60

60 hours

Answer 2

Answer:

answer is in the attachment

Step-by-step explanation:

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