Question
If the volume of a cylinder is 400π and the ratio of
radius to its height is 5:2 then find the curved surface area of cylinder?Solution
Volume of cylinder = 400π ⇒ πr2h = 400π ⇒ r2h = 400 units ⇒ 25x2*2x = 400 units ⇒ x3 = 8 ⇒ x = 2 Radius = 10 units & height = 4 units. Curved surface area = 2πrh Curved surface area = 80π unit ²
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