Answer:
52 miles per hour
Explanation:
Firstly, It is important to point out that it is Average speed. The Average speed throughout all the way the car traveled.
And this is may calculated by a simple formula or if you'd rather by a proportion. Let's pick this simple formula, what's going to be useful.
Let's do the math!
Average speed = Δs/Δt
Δs = Variation of Space (given in miles) =156 -0
Δt =Variation of Time (given in hours) =3-0
Average Speed = 156-0/3-0 =156/3 =52 miles per hour
It is important to say, Average speed, is a rate so it is given in miles per hour