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Total Surface Area of a Cuboid

A cuboid is 1...

Question

A cuboid is 12 cm long, 9 cm broad and 8 cm high.Its total surface area is
$(a) 864 c m^{2} (b) 552 c m^{2} (c) 432 c m^{2} (d) 276 c m^{2}$

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Solution

ANSWER: (b) 552 cm
Total surface area of the cuboid = 2 (lb+bh+lh ) $c m^{2} = 2 (12 \times 9 + 8 \times 9 + 12 \times 8) c m^{2}$

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