Projectile Probs: Hobby Rocket Launch Angle & Speed

[gamacmua]

Ina projectile motion, if we measure the maximum
height h and horizontal range R
(1) How to get launch angle θin terms of h and R
(2) A hobby rocket reaches a height of 72.3 m and lands 111 m from the launch point.
What is the angle of launch?
What is the launch speed?


I already did part 1. Can you provide me help with part 2. Thanks

 

[tiny-tim]

Welcome to PF!

(2) A hobby rocket reaches a height of 72.3 m and lands 111 m from the launch point.
What is the angle of launch?
What is the launch speed?

Hi gamacmua! Welcome to PF!

Show us what you've tried, and where you're stuck, and then we'll know how to help.