A person standing on level ground from the base of the Skylon Tower in Niagara Falls observes an elevator going up the side of the tower. At one instant, the angle of elevation to the elevator is 42.5° and then 15.0 s later, the angle of elevation is 60.7°. If the elevator travels at a rate of 10.0 ft/s, how high above ground is the elevator at the second instant?