To me, this says that the hypotenuse (i.e., z), not the horizontal base of the ramp, is 30'. But in any case, the answer is . If , as I think, then the answer is 8 ft/second.A waterskier skis over a ramp with a length of 15' and a height of 4' at a constant speed of 30 ft/second. How fast is she rising as she leaves the ramp?