Compute all parts of following problem given below:
Problem: A projectile is launched from a cliff 10 m high at a velocity of 40m/s in such a direction as to strike the top of a 30 m tower 100 m away in 2.951 seconds.
Part A: Calculate the value of the angle?
Part B: It is found that the projectile can be fired at the same speed but at a different angle and still hit the tower, Calculate the other value of that angle and the time of flight?
Please Help and show steps. I am trying to understand how to work this problem. Thanks in advance!