A tap having diameter d can empty a tank in 40 min. How longanother tap having diameter 2d take to empty the same tank?
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Area of tap ... Work done by pipe. When diameter is doubled, area will be four times. So, it will work four times faster.
Hence, required time taken to empty the tank = 40×1/4 = 10 min.
Hence, required time taken to empty the tank = 40×1/4 = 10 min.
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