You used density, because water/ice has a density of 1, and ice will sink in anything with a lesser density
Answer:
12.31 m/s
Explanation:
If we recall from the previous knowledge we had about speed,
we will know that:
speed = distance/ time.
As such:
The average speed of the rider bicycle is
average speed = total distance/ total time
Mathematically, it can be computed as:





Point a because point a is the highest at potential energy converting into the highest kinetic energy.