Evaluate ∫0π∫01r2drdθ\int_0^{\pi} \int_0^1 r^2 dr d\theta∫0π∫01r2drdθ.
π3\frac{\pi}{3}3π
π2\frac{\pi}{2}2π
π\piπ
2π3\frac{2\pi}{3}32π