Answer
$dV = 1.96 m^3$
Work Step by Step
$v = \frac{2}{3} \pi r^3$
$\frac{dv}{dr} = 2\pi r^2$
Solve for $dv$:
$dv = 2\pi r^2 dr$
$dv = 2\pi (25)^2 (0.0005)$
$dv = 1.96 m^3$
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