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35. In a hospital, used water is collected in a cylindrical tank of diameterm and height 5 m. After recycling, this water is used to irrigate apark of hospital whose length is 25 m and breadth is 20 mfilled completely then what will be the height of standing water usedfor irrigating the park? Write your views on recycling of water2. If the tank isCBSF 20177 |
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Answer» Diameter of cylinder (d) = 2 mRadius of cylinder (r) = 1 mHeight of cylinder (H) = 5 mVolume of cylindrical tank, Vc = πr2H = π×(1)2×5=5π m Length of the park (l) = 25 mBreadth of park (b) = 20 mthe height of standing water in the park = h Volume of water in the park = lbh = 25×20×h Now water from the tank is used to irrigate the park. So, Volume of cylindrical tank = Volume of water in the park ⇒5π=25×20×h⇒5π/25×20=h⇒h=π/100 m⇒h=0.0314 m Through recycling of water, better use of the natural resource occurs without wastage. It helps in reducing and preventing pollution. It thus helps in conserving water. This keeps the greenery alive in urban areas like in parks gardens etc. |
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