Rain water, which falls on a flat rectangular surface of length 6 m and breadth 4 m is transferred into a cylindrical vessel of internal radius 20 cm. What will be the height of water in the cylindrical vessel if a rainfall of 1 cm has fallen?

Volume of rainfall = lbh


= 6 × 4 × 0.01


= 0.24 m3


Volume of water in cylindrical vessel = volume of rainfall


πr2h = 0.24



h ≈ 1.91m = 191cm


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