If a tank fill by a tap in 30 hours. Then how many hours will it take

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If a tank fill by a tap in 30 hours. Then how many hours will it take to empty by 4 taps??

Abhay Goyal

March 12, 2019, 7:33 p.m.

Answers!

TECHNOJOKER GB

March 13, 2019, 7:08 a.m.

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