Question

Six pumps working together empty a tank in 28 minutes. How long will it take to empty the tank if 4 such p mps are working together?

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Answer 1

Answer:

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Answer 2

Answer:

Time taken by 6 pumps to empty a tank = 28 minutes. We need to find time taken by 4 such pumps to empty the tank. As the number of pumps are decreasing so the time taken will also increase.