Question

Find the curved surface area of cylinder whose height is 20cm & radius of the base is 3.5
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Answer 1

Height =20 cm

Radius of the base= 3.5 cm

Curved Surface of cylinder = 2πrh

$\: \: \: \: \: \: \: \: \: \: = 2 \times \frac{22}{7} \times 3.5 \times 20 =440 \: cm^{2}$