Pipe A B and can fill a Full Tank in 24 36 and 48 Minutes respectively All three Pipes are Opened si...........

Quantitative Aptitude ( CCS) Pipes&cistern

Pipe A, B and can fill a Full Tank in 24,36 and 48 Minutes respectively. All three Pipes are Opened simultaneously in a Tank which is already filled up to 1/6 of its capacity. A and B are opened for only First 6 Minutes and closed thereafter.Then C alone filled remaining Tank. Then in total how many Minutes does C filled the Tank?

12 Minutes