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Multiple Choice Questions

If the diagonal of a cube is of length l then the total surface area of the cube is ........

Quantitative Aptitude (CDS) Mensuration 2D

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If the diagonal of a cube is of length l, then the total surface area of the cube is

3l²

$\small \sqrt{3}l^{2}$

$\small \small \sqrt{2}l^{2}$

2l²

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Explanation:

Let the side of cube = a

Diagonal = $\small \sqrt{3}a$

a = 1/3

Total surface area(TSA) = 6a²

$\small 6(\frac{1}{\sqrt{3}})^{2} = 2l^{2}$

By: Munesh Kumari

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