Question

the raduis of the base of cylinder is 20 CM & height is 30 CM then find the curved surface area of cylinder (take pie = 3.14)​

Answer 1

Answer:

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Answer 2

$\sf{\bold{\green{\underline{\underline{Given}}}}}$

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• Radius = 20cm
• Height = 30cm

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$\sf{\bold{\green{\underline{\underline{To\:Find}}}}}$

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• Curved surface area = ??

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$\sf{\bold{\green{\underline{\underline{Solution}}}}}$

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$\sf{\red{\boxed{\bold{CSA = 2\pi\times R\times H }}}}$

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$\sf :\implies{\bold{ CSA = 2\times 3.14\times 20\times 30 }}$⠀⠀⠀

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$\sf :\implies{\bold{ CSA = 6.28\times 20\times 30 }}$

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$\sf :\implies{\bold{ CSA = 6.28\times 600 }}$

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$\sf :\implies{\bold{ CSA = 3768.00 cm^2 }}$

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$\sf{\bold{\green{\underline{\underline{Answer}}}}}$

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• CSA of cylinder = 3768cm²

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$\sf{\orange{\boxed{\bold{Extra\: info :-}}}}$

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• Volume of cylinder ( Area of base × height )= (πr²) × h = πr²h

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• Curved surface = ( Perimeter of base ) × height = (2πr) × h = 2πrh

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• Total surface are = Area of circular ends + curved surface area = 2πr² + 2πrh = 2πr(r + h)

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• Where, r = radius of the circular base of the cylinder , h = height of cylinder.