If a cannonball is shot from a longer barrel cannon rather than a shorter barrel cannon it willl have a?

Answer 1

Longer (effective) range.

Longer barrels on a firearm allow for more complete burning of the propellant, which results in a higher muzzle velocity, which in turn results in a longer effective range, when compared to an identical weapon with a shorter barrel.

Answer 2

Higher velocity, longer range and flatter trajectory.