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A pipe can filla tankin 30 minutes. Due to a leak in the bottom it is filled in 40 minutes. If the tank is full, how much time will the leak take to empty it?

A50 minutes

B100 minutes

C1.5 hours

D2 hours

Answer:

D. 2 hours

Read Explanation:

x= 30 y = 40 xy/y-x = (30 x 40) / (40 - 30) = (30 x 40)/10 = 120 minutes = 2 hours.


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