A car takes a circular bend of radius 120 m at a steady 72 km/h…

Step 1. Units. $72\ \text{km/h} = \dfrac{72}{3.6} = 20\ \text{m/s}$.

Step 2. Acceleration. $a = \dfrac{(20\ \text{m/s})^2}{120\ \text{m}} = 3.33\ \text{m/s}^2$, towards the centre of the bend.

Step 3. Angular velocity. $\omega = \dfrac{20\ \text{m/s}}{120\ \text{m}} = 0.167\ \text{rad/s}$.

Step 4. One circle. $T = \dfrac{2\pi \times 120\ \text{m}}{20\ \text{m/s}} = 37.7\ \text{s}$.