Question

A car starts from rest at a place A and moves along straigght road till it comes to rest at a place b which is at a distance of 450m from a .The car accelerates and decelerates uniformly and rate of its acceleration is double the rate of its deceleration .It takes a total time of 30s to reach from point B to A.Find the time in seconds fr which the car moves the constant velocity during its motion of the maximum speed attained by the car is 72Km/hr...........

Answer 1

Answer:

Time is 30 seconds . because whole motion is constant.