Question

Two pipe, A & B can fill a tank in 12 & 16 minutes respectively. Both pipes are opened together, but 4 minute before the tank is full, pipe A is closed. In how many minutes will the tank be full? (a) 9 minutes 8 seconds (b) 10 minutes 9 seconds (c) 11 minutes 19 seconds (d) 11 minutes 29 seconds

Answer 1

Step-by-step explanation:

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