Suppose that the distance an aircraft travels along a runway before takeoff is given by D=(10/9)t2, 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 160 km/h. How long will it take to becomeairborne, and what distance will it travel in thattime?

Question 1) How long will the airplane take to become airbone? Answer in _____sec