A car, which is initially stationary, accelerates for 5.0 seconds at 4.0 m / s^2 along a straight road. It then continues in the same direction for 20 seconds at a constant speed.

What is the maximum speed of the car, and what is the distance travelled by the car in the final 20 seconds of its motion?

A. maximum speed = 24 m / s; distance = 480 m

B. maximum speed = 20 m / s; distance = 400 m

C. maximum speed = 9.0 m / s; distance = 200 m

D. maximum speed = 9.0 m / s; distance = 180 m

E. maximum speed = 20 m / s; distance = 80 m