A pipe can fill a tank in 3 hours. There are two outlet pipes from the tank whic

Question

A pipe can fill a tank in 3 hours. There are two outlet pipes from the tank which can empty it in 7 and 10 hours respectively. If all the three pipes are opened simultaneously, then the tank will be filled in -

Options:

A . 8 hours

B . 9 hours

C . 10 hours

D . 11 hours

Answer: Option D

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