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Correct Answer: 3600 Ltrs.

Let A hours be the time taken by the fill pipe to fill the tank and 8 hours be the time taken for the leak at the bottom of the tank to drain the tank.

Then, 1/A−1/B=−1/6.

We know that 1/B=1/3 (given)

Or 1/A−1/3=−1/6 or 1/A=1/6

Or A = 6 hrs or 360 min.

Capacity of the tank = 10 ltr/min x 360 min = 3600 Itrs.