Find the curved surface area of a cylinder whose radius is 21 cm and height is 4 cm
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Radius of the cylinder = 21 cm
= 21/100 = 2.1 m
Height of the cylinder = 4 m
(i) Curved surface area of the cylinder = 2πrh
= 2 × 22/7 × 2.1 × 4 = 52.8 m2
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