Question

Find the C.S.A of a cylinder of radius 21cm and height 28cn​

Answer 1

Answer:

The CSA of cylinder = 2πrh

= 2 × 22 /7 ×21×28

= 44×3×28

= 3696cm square

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Answer 2

Answer:

$r = 21cm \\ h = 28cm \\ \: c.s.a \: of \: cylinder \: = 2\pi \: rh \\ 2 \times \frac{22}{7} \times 21 \times 28 \\ \\ = 3696cm^2$

Step-by-step explanation:

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