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The diagonal of a cube is 63 cm. Find its surface area

216 sq.cm
316 sq.cm
416 sq.cm
516 sq.cm

Correct Answer: 216 sq.cm

Explanation:

Let the edge of the cube be a.

so, the diagonal a $3$ = $63$

=> a=6

Surface area = $6 a 2$ = 6 x 6 x 6 = 216 sq.cm

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