Calculating Average Speed of a Baseball in Horizontal Projectile Motion

[momoskittles]

This is the problem word for word:
A student throws a baseball at a large gong
48 m away and hears the sound of the gong
1.18893 s later. The speed of sound in air is
330 m/s.
What was the average speed of the baseball on its way to the gong? (For simplicity,
assume its trajectory to be a straight line.)
Answer in units of m/s.

I don't need the answer. I'd really just like to be pointed in the right direction.
Thanks so much.

 

[tms]

The first thing to do is to write down the relevant kinematic equations.