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The surface area of a $10 cm \times 4 cm \times 6 cm$ brick is

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84 c m^{2}

124 c m^{2}

248 c m^{2}

180 c m^{2}

answer is C.

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Detailed Solution

Given that, the dimensions of a brick is

10 cm \times 4 cm \times 6 cm

.
The formula for the surface area of the cuboid having length, breadth and height as

l, b

and

h

respectively is given as

2 (lb + bh + hl)

.
So, the surface area of the brick will be,

\Rightarrow 2 (10 \times 6 + 4 \times 6 + 4 \times 10)

\Rightarrow 2 (60 + 24 + 40)

\Rightarrow 248

c m^{2}

Therefore, the surface area of brick is

248 c m^{2}

.
Hence option (3) is correct.

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