Answer
$\frac{1}{60}$
Work Step by Step
$\frac{a^3}{2}\div30a^3=\frac{a^3}{2}\times\frac{1}{30a^3}=\frac{a^3\times1}{2\times30a^3}=\frac{a^3}{60a^3}=\frac{a^3\div a^3}{60a^3\div a^3}=\frac{1}{60}$
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