Question:
Tick (✓) the correct answer:
The surface area of a (10 cm × 4 cm × 3 cm) brick is
(a) 84 cm2
(b) 124 cm2
(c) 164 cm2
(d) 180 cm2
Solution:
(c) $164 \mathrm{sq} \mathrm{cm}$
Surface area $=2(10 \times 4+10 \times 3+4 \times 3)=2(40+30+12)=164 \mathrm{~cm}^{2}$
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