Ray Optics and Optical Instruments Part 3

The driver sitting inside a parked car is watching vehicles approaching from behind with the help of his side view mirror, which is a convex mirror with radius of curvature R=2m. Another car approaches him from behind with a uniform speed of 90‌km∕hr. When the car is at a distance of 24 m from him, the magnitude of the acceleration of the image of the car in the side view mirror is ' a '. The value of 100a is ______ m∕ s2.