Consider a car initially at rest, starts to move along a straight road first with acceleration 5 m/s^2, then with uniform velocity and finally decelerating at 5 m/s^2, before coming to stop. Total time taken from start to end is `t = 25s`. If the average velocity during that time is 72 km/hr, the car moved with uniform velocity for a time of

Options

A. 15 s
B. 30 s
C. 155 s
D. 2 s