Question

find curved surface of cylinder if r=7 cm and h= 21 cm step by step​

Answer 1

Answer:

924 cm²

Step-by-step explanation:

CSA of cylinder = 2πrh

r = 7 cm h = 21 cm

CSA =

$= 2\pi \: rh \\ = 2 \times \frac{22}{7} \times 7 \times 21 \\ = 2 \times 22 \times 21 \\ = 44 \times 21 \\ = 924 \: {cm}^{2}$

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