Need help with this Projectile question (1 Viewer)

[vilst3r]

The question I need help is : find to nearest m, its distance from A when it strikes the ground ( the bottom half)
For that, I'm stuck at x=160sin2(theta) for the range equation but I can't get the distance without finding the angle of projection which I'm uncertain of finding... The answer is 226m. Any quick help would be appreciated

 

[Carrotsticks]

The question I need help is : find to nearest m, its distance from A when it strikes the ground ( the bottom half)
For that, I'm stuck at x=160sin2(theta) for the range equation but I can't get the distance without finding the angle of projection which I'm uncertain of finding... The answer is 226m. Any quick help would be appreciated

The initial projection angle is 0 because it is fired horizontally.