Find the curved surface area of a cylinder with radius $7$ cm and height $10$ cm. Take $\pi=\dfrac{22}{7}$.

Find the curved surface area of a cylinder with radius $7$ cm and height $10$ cm. Take $\pi=\dfrac{22}{7}$.
  1. $220 \text{ cm}^{2}$
  2. $440 \text{ cm}^{2}$
  3. $880 \text{ cm}^{2}$
  4. $308 \text{ cm}^{2}$

Solution

CSA $= 2\pi r h = 2 \times \dfrac{22}{7} \times 7 \times 10 = 2 \times 22 \times 10 = 440 \text{ cm}^{2}$.

Asked in: IMO

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