A car enters the ramp at point A travelling at 40 m/s. The driver applies the brakes resulting in a constant deceleration over a distance of 200 m of ramp between point A and point B. The radius of curvature of the road at point B is 70 m, and the normal acceleration of the car at point B is 4.9 m/s2. How long does it take the car to travel from point A to point B?