Question

What will be
the curved surface area of a cylinder with 7
m radius and 10 m height?​

Answer 1

Given : The Radius of Cylinder is 7m & Height of the Cylinder is 10 m .

Exigency to find : The Curved surface area of Cylinder.

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⠀⠀⠀⠀⠀Finding Curved surface area of Cylinder :

$\dag\:\:\it{ As,\:We\:know\:that\::}$

$\qquad \dag\:\:\bigg\lgroup \sf{Curved \:Surface\:Area _{(Cylinder)} \:: 2 \pi r h }\bigg\rgroup$

⠀⠀⠀⠀⠀Here r is the Radius of Cylinder , h is the Height of Cylinder & $\pi \:=\:\dfrac{22}{7}$

⠀⠀⠀⠀⠀⠀$\underline {\boldsymbol{\star\:Now \: By \: Substituting \: the \: known \: Values \::}}$

$\qquad \longmapsto \sf 2 \times \dfrac{22}{7} \times 7 \times 10 \\\\\qquad \longmapsto \sf 2 \times \dfrac{22}{\cancel {7}} \times \cancel {7} \times 10 \\\\ \qquad \longmapsto \sf 2 \times 22 \times 10 \\\\\qquad \longmapsto \sf 44 \times 10 \\\\\qquad \longmapsto \frak{\underline{\purple{\:Curved \:Surface\:Area\:= 440cm^2 }} }\bigstar$

Therefore,

⠀⠀⠀⠀⠀$\therefore {\underline{ \mathrm {\:Curved \:Surface \:Area\:of\:Cylinder \:is\:\bf{440\:cm^2}}}}$

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Answer 2

Given,

• Radius of Cylinder = 7m
• Height of Cylinder = 10m

To Find,

• The CSA of Cylinder.

Solution,

Radius of Cylinder (R) = 7m

Height of Cylinder (H) = 10m

CSA of Cylinder = 2 × π × R × H

→ CSA of Cylinder = 2 × π × 7m × 10m

→ CSA of Cylinder = 2 × 22/7 × 7m × 10m

→ CSA of Cylinder = 2 × 22 × 10m²

→ CSA of Cylinder = 440m²

Required Answer,

CSA of Cylinder = 440m²