Question

The perimeter of a cube is 40 cm. then its area is

Answer 1

Hey ....!!

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$Perimeter\: of \:cube = 4 a(edge) \\ \\ Perimeter = 40cm \\ \\ \frac{Perimeter}{4} = a \\ \\ \frac{40}4 = a \\ \\ a = 10 cm \\ \\ Area \:of\: cube = 6{a}^{2} \\ \\ 6({10}^{2})\\ \\ 6 \times100 \\ \\ 600 {cm}^{2}$

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