Question

the circumference of the base of the right circular cylinder is 220 CM. if the height of the cylinder is 2 metre ,find the lateral surface area of the cylinder

Answer 1

As we know,
Circumference=2×π×r
220=2×22/7×r
By calculating,
r=35 cm
h=200 cm
lateral surface area of cylinder= 2πrh
=2×22/7×35×200
= 44000 sqcm
= 440 sqm

Answer 2

$\huge \underline \mathsf \red {Solution:-}$

Let the height and radius of the cylinder be h and r cm respectively.

Given:

• Height is 2m = 200cm

As, circumference of base = 220

2πr = 220

➠ $\mathsf {2 \times\frac{22}{7} \times r = 220}$

r = 35 cm

➠ $\mathsf {2 \times\frac{22}{7} \times 35 \times h}$

➠ $\mathsf {2 \times\frac{22}{7} \times 35 \times 220}$

As, Lateral surface of cylinder = 2πrh

= 44000 cm²

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