Find the total surface area of a cylinder of radius $7$ cm and height $14$ cm. Use $\pi=\dfrac{22}{7}$.

Find the total surface area of a cylinder of radius $7$ cm and height $14$ cm. Use $\pi=\dfrac{22}{7}$.
  1. $616 \text{ cm}^{2}$
  2. $924 \text{ cm}^{2}$
  3. $308 \text{ cm}^{2}$
  4. $1232 \text{ cm}^{2}$

Solution

TSA $= 2\pi r (r+h) = 2 \times \dfrac{22}{7} \times 7 \times (7+14) = 44 \times 21 = 924 \text{ cm}^{2}$.

Asked in: IMO

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