Question

the circleumference of the base of a cylinder is 180cm and it's height is 30cm.Find its lateral surface area.
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Answer 1

Using the circumference we will find out the radius first.

Circumference=2πr

180=2×22/7×r

180×7/44=r

28.64=r

Now, lateral surface area=2πrh

=2×22/7×28.64×30

=5400.68571 cm²

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Answer 2

LSA OF CYLINDER=$2\pi RH$

$2\pi R=180\\R=57.2$

$2*\frac{22}{7} *57.2*30$

=10786 M^2

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