Question

find the curved surface area of total surface area of the cylinder with the following dimension.
radius - 21 cm
height - 10cm
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Answer 1

Answer:

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Step-by-step explanation:

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Answer 2

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$given \\ r = 21 \: cm \\ h = 10 \: cm \\ \\ using \: the \: formulae \\ csa \: of \: cylinder = 2\pi \times r \times h \\ = 2 \times \frac{22}{7} \times 21 \times 10 \\ = 1320 \: cm \\ \\ tsa \: of \: cylinder = 2\pi \times r(h + r)\\ = 2 \times \frac{22}{7} \times 21(10 + 21) \\ = 2 \times 22 \times 3(10 + 21) \\ = 44 \times 3(10 + 21) \\ = 44 \times 30 + 63 \\ = 1320 + 63 \\ = 1383 \: cm$

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