A racing car weighing 7120 N reaches a speed of 430 km/h within 400 m. car surface area A=2.3 m2 as soon as the driver passes the timing lights He opens his resistance parachute. By ignoring the car's air and rolling resistance, it can reach the car's speed of 160 km/h in standard air. Calculate the time required for it to slow down. (air=1.227 kg/m3 , Cd=1.42)