Suppose that the distance an aircraft travels along a runway before takeoff is given by upper d equals (5 divided by 3 )t squared, where d is measured in meters from the starting point and t is measured in seconds from the time the brakes are released. the aircraft will become airborne when its speed reaches 480 km divided by h. how long will it take to become airborne, and what distance will it travel in that time? how long will the airplane take to become airborne?