Question

A cannon elevated at 40 degrees is fired at a wall 300m away on level ground. The initial speed of the cannonball is 89m/s How long does it take for the ball to hit the wall? At what height does the ball hit the Wall?

Answer 1

For the answer to the question above, we'll have to use these formulas.

A) to find time to travel the 300m,
just find horizontal component of the velocity and divide.
ie x=89 x t x cos 40, t=x/89 x cos 40 

B) y=vtsin 40 - gt^2/2, just sub in

I believe you can do the rest.

I hope I helped you with my answers.