Answer:
The horizontal distance the ball travels before returning to the ground is 19.5 m
Explanation:
Formula of range of horizontal distance =

Where u is the initial velocity
g is gravity
We are given that A ball is kicked off the ground with a velocity of 15 m/s at an angle of 30° horizontally.
So, u = 15 m/s

g = 10
So, the horizontal distance the ball travels before returning to the ground =

Hence The horizontal distance the ball travels before returning to the ground is 19.5 m