police officer in a patrol car parked in a70km/h observes a passing auto mobile travelling at a slow constant speed believing that of the automobile might be intoxicated the officer starts his car accelerate uniformly to 9km/h in 8s.and maintaining a constant velocity of 90km/h overtakes the motorists 42s after the automobile passed him knowing that 18s clapsed before the officer hegan pursuing motorists determine,1.the distance the officer traveled before overtaking.2.the motorists speed
distance=1/2 a *8^2 + speed(T-8-18)
change a, and speed to m/s
T=42 sec