10. A motorist travelling at 16 m/s wishes to pass another car, To do this, he accelerates for 3.0 s, then travels at a uniform speed for 3.0 s, then decelerates to resume his speed of 16 m/s. The whole operation takes 10.0 s, and during this time he travels 180 m in a straight line. Assuming that his accelerations were uniform, calculate the maximum speed he attained