Two pipes can separately fill a tank in 20 hours and 30 hours respectively. B

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Two pipes can separately fill a tank in 20 hours and 30 hours respectively. Both the pipes are opened to fill the tank but when the tank is full, a leak develops in tl1e tank through which one-third of water supplied by both the pipes goes out. What is the total time taken to fill the tank?

Options:

A . 14 hr.

B . 15 hr.

C . 16 hr.

D . 17 hr.

Answer: Option C

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