Aman is flying in a hot-air balloon in a straight line at a constant rate of 5 feet per second, while keeping it at a constant altitude. as he approaches the parking lot of a market, he notices that the angle of depressions from his balloon to a friend's car in the parking lot is 35 ∘ . a minute and a half later, after flying directly over this friend's car, he looks back to see if friend getting into the car and observes the angle of depression to be 36 ∘ . at that time, what is the distance between him and his friend? (round to the nearest foot.)