A juggler at a fun park throws a ball upwards such that the ball's height h in feet above the ground after t seconds is given by h=-16t²+20t+5. At the same time, a scenic elevator begins climbing a tower at a constant rate of 20 feet per second. Its height h in feet after t seconds is given by h=20t. Find the approximate time it takes for the ball and the elevator to reach the same height.