Question

radius of base of a cylinder and it's height are given find the curved surface area r=4.2,h=14

Answer 1

Curved surface area of cylinder =
$2\pi \: rh$
=2 * 22/7 * 4.2 * 1.4
=2 * 22 * 4.2 *2
=44 * 4.2 * 2
=88 * 4.2
=369.6

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Answer 2

C. S. A of cylinder = 2 × pie × r × h
C. S. A = 2 × 22/7 × 4.2 × 14
C. S. A = 369.6 sq. units
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