A question on projectile motion

[jysim]

Homework Statement

A ball is shot from a cannon on a hill that is 1.93m high and lands 17.34m away after 1/586s. What was the initial velociy of the ball?

I would really appreciate if you can provide explanation as well! Thanks!

 

[tiny-tim]

welcome to pf!

hi jysim! welcome to pf!

call the initial speed "v", and use the standard constant acceleration equations for the x and y directions (separately) …

what do you get? ​