Find the total surface area of a cube of edge $7$ cm.

Find the total surface area of a cube of edge $7$ cm.
  1. $294 \text{ cm}^{2}$
  2. $343 \text{ cm}^{2}$
  3. $196 \text{ cm}^{2}$
  4. $147 \text{ cm}^{2}$

Solution

TSA of cube $= 6 a^{2} = 6 \times 49 = 294 \text{ cm}^{2}$.

Asked in: IMO

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