If the lateral surface of a cylinder is 94.2 -Maths 9th

If the lateral surface of a cylinder is 94.2 -Maths 9th
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Height of the cylinder (h) = 5 cm  Let r сm be the radius of the base Lateral surface area of cylinder = 94.2 cm2  ⇒ 2 πrh = 94.2 cm2 2 x 3.14 x r x 5 = 94.2 ⇒  r = 94.2/2 x 3.14 x 5 = 94.2/31.4 = 3 cm Thus, radius of the base of cylinder = 3 cm.  (ii) Volume of cylinder =  πr2h = 3.14 x 32 x 5 = 141.3 cm3
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