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Cube Numbers

Question 15 T...

Question

Question 15

The volume of a cube whose edge is 3x is

(a) $27 x^{3}$ (b) $9 x^{3}$ (c) $6 x^{3}$ (d) $3 x^{3}$

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Solution

We know that, the volume of a cube $= (S i d e)^{3}$
$= a^{3}$
$= (3 x)^{3}$ $[∵ a = 3 x, g i v e n]$
$= 27 x^{3}$

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