A sphere has a volume of $\frac{500\pi}{3}$ cm³. Find the radius of the sphere.

Volume of sphere = (4/3)πr³, so (4/3)πr³ = (500π/3). Dividing both sides by π: (4/3)r³ = 500/3, giving r³ = (500/3) × (3/4) = 125. Therefore r = ∛125 = 5 cm. Candidates who confuse the formula or fail to cube-root correctly arrive at the other options.