Question

if the radius and height of a circular cylinder are π and π/2 respectively, then find its total surface area.​

Answer 1

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Radius= π

$\sf \: Height= \large \frac {\pi}{2}$

TSA=2πr(h + r)

$\sf \implies2\pi r( \frac{\pi}{r} + \pi)$

r=π, so

$= \sf2\pi\pi( \frac{\pi}{2} + \pi) \\ \\ \sf \implies {2\pi}^{2} ( \frac{2\pi}{2} ) = {2\pi}^{3}$

So TSA of cylinder is 2π³

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Answer 2

Answer:

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• Radius= π

$\bf\: Height= \large \frac {\pi}{2}$

• TSA=2πr(h + r)

$\bf\implies2\pi r( \frac{\pi}{r} + \pi)$

• r=π, so

$= \sf2\pi\pi( \frac{\pi}{2} + \pi) \\ \\ \sf \implies {2\pi}^{2} ( \frac{2\pi}{2} ) = {2\pi}^{3}$

• So TSA of cylinder is 2π³

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