A hot air balloon is ascending straight up at a constant speed of 5.70 m/s. When the balloon is 11.0 meter above the ground, a gun fires a pellet straight up from ground level with an initial speed of 33.0 m/s. Along the paths of the pellet and the balloon, there are two places where each of them has the identical altitude at the same time. Compute how far above ground level are these places?