how high a building can superman jump over if he is to leave the ground with a velocity of 60 m/s at an angle of 75 degrees

Answer 1

Superman flies, not jumps. Haven't you seen the movies?
In the vertical..
Vi=60m/s * sin 75

at the top, Vf in the vertical is zero.
Vftop^2=Vi^2 + 2gh

g=-9.8m/s^2, Vftop=0 solve for h.

Answer 2

-168