The equations that model both the paths, give the distance or height above the ground with respect to time. So, if we equate both the equations, we can find the time at which the height of two balls is the same.
[tex]-16 t^{2} +56t=-16 t^{2} +156t-248 \\ \\
248=100t \\ \\
t=2.48[/tex]
Therefore, rounding of to nearest tenth, it will take 2.5 seconds after the first ball was hit, for the two balls to be at the same height.
