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A cylinder has base radius 4 cm and height 10 cm. Then find its lateral surface area.

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A cylinder has base radius 4 cm and height 10 cm. Then find its lateral surface area.

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Perimeter of a circle with radius 4 cm = 2 × π × 4 = 8π cm.

Curved surface area of the cylinder = Base

perimeter × height = 8 π × 10 = 80 π cm2

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