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Pipes A, B, and C can fill a tank in 30 minutes, 45 minutes, and 60 minutes respectively. All the pipes are opened together. A is closed after n minutes, and B is closed (2n - 2) minutes before the tank is filled. If the tank is filled in 28 minutes, find the value of n.

A 14

B 12

C 18

D 16

E None of these

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