A car travels in a flat circle of radius R. At a certain instant the velocity of the car is 24 m/s west, and the acceleration of the car has components of 2.4 m/s2 east and 1.8 m/s2 south. What is the radius of the circle?
1) 0.24 km
2) 0.19 km
3) 0.32 km
4) 0.14 km
5) 0.27 km
Answer: 3