Finding range given impact velocity?

[jerm174]

A projectile shot over level ground hits the ground with a velocity of 65m/s at an angle of 25° below the horizontal. What was the horizontal range of the projectile?
170m
330m
780m
360m

If something is launched over a horizontal plane, does V_i=V_f? (same magnitude and velocity) (but different direction obviously).
Would I then be able to find V_ix and Δt to find the Δx (range)?

 

[berkeman]

A projectile shot over level ground hits the ground with a velocity of 65m/s at an angle of 25° below the horizontal. What was the horizontal range of the projectile?
170m
330m
780m
360m

If something is launched over a horizontal plane, does V_i=V_f? (same magnitude and velocity) (but different direction obviously).
Would I then be able to find V_ix and Δt to find the Δx (range)?

Welcome to the PF.

Yes, over level ground with no air resistance, the launch and impact velocities and angles should be symmetrical.