If the dimensions of a cuboid are 3 cm, 4 cm and 10 cm, then its surface area( in $c m^{2}$ ) is:

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Solution

Let l = 3 cm, b = 4 cm and h = 10 cm

Surface area of a cuboid= 2(l × b + b × h + l × h)

= 2 (3 × 4 + 4 × 10 + 3 × 10)

= 2(12 + 40 + 30)

= 2×(82)

= 164 $c m^{2}$

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