Three pipes A, B and C can fill a cistern in 6 hours. After working at it togeth

Question

Three pipes A, B and C can fill a cistern in 6 hours. After working at it together for 2 hours, C is closed and A and B can fill the remaining part in 7 hours. The number of hours taken by C alone to fill the cistern is:

Options:

A . 12

B . 14

C . 16

D . 18

Answer: Option B

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