Answer
3$x^{2}$$\frac{dx}{dt}$
Work Step by Step
Volume of a cube: V= $x^{3}$
$\frac{dV}{dt}$ = $\frac{dx}{dt}$($x^{3}$)
$\frac{dV}{dt}$ = 3$x^{2}$$\frac{dx}{dt}$
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