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Two interconnected reservoirs have surface areas of 3000 and 1000m^2, respectively. The connecting pipe has a...

Two interconnected reservoirs have surface areas of 3000 and 1000m^2, respectively. The connecting pipe has a diameter of 0.3m, a length of 10,000m and a Darcy Weisbach coefficient f= 0.025. The initial difference in water surface elevation between the two reservoirs was 120m. Determine the time required for the difference to drop (1)110m, (2) 100m, and (3) 90m. Ignore minor losses.

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