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 it in 7 hours. The time taken by C alone to fill the cistern is ?

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

1.	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 it in 7 hours. The time taken by C alone to fill the cistern is ?
A.	10 hours
B.	12 hours
C.	14 hours
D.	16 hours
Answer» D. 16 hours

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