Find the lateral surface area of a cuboid $20$ cm $\times 15$ cm $\times 10$ cm (where $10$ cm is the height).

Find the lateral surface area of a cuboid $20$ cm $\times 15$ cm $\times 10$ cm (where $10$ cm is the height).
  1. $700 \text{ cm}^{2}$
  2. $1300 \text{ cm}^{2}$
  3. $1400 \text{ cm}^{2}$
  4. $3000 \text{ cm}^{2}$

Solution

LSA of cuboid $= 2 h (l+b) = 2 \times 10 \times (20+15) = 20 \times 35 = 700 \text{ cm}^{2}$.

Asked in: IMO

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