find the curved surface area of a cylinder whose radius is 21 cm and height is 4cm
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Step-by-step explanation:
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Step-by-step explanation:
Radius = 21 cm
Height = 4 cm
Curved surface area of cylinder = 2 x pi x r x h
Now substitute the values in given formula.
=2 x 22/7 x 21 x 4
= 2 x 22 x 3 x 4
= 44 x 12
= 528 cm ^2
Therefore, 528cm^2 is answer.
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