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Doctors Medicines MCQs Q&A

If the total surface area of cube is 96 cm2, then side of cube is ………

(A) 3 cm 

(B) 5 cm 

(C) 6 cm 

(D) 4 cm

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2 Answers

Correct option is: (D) 4 cm

Let side of cube be a.

Then total surface are of cube is \(6\, a^2\).

But given that total surface area of cube is 96 \(cm^2\).

\(\therefore\) \(6\, a^2\) = 96

= \(a^2 = \frac {96}6 = 16 = 4^2\)

\(\therefore\) a = 4 cm

Hence, the side of cube is 4 cm.

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Correct option is: (D) 4 cm

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