So that is equal to 180 miles per 2 hours which is 90 miles per hour if each hour has the same m/hr rate.
You can set up a proportion:
let x = number of miles per hour

cross multiply and you get
2x=180
divide both sides by 2 and you get
x=90
so you get the same answer both ways,
90 miles per hour
Answer:
A square has 4 sides with equal length.
So the perimeter of a square is equal to 4 times the length of one side.
Now, suppose that we know that the length of one side of the garden is x.
Then the total length of the fence that surrounds the square is:
L = 4*x.
Now let's define proportional quantities:
x and y are proportional quantities if:
x = k*y
where k is a constant of proportionality.
In the case of our problem, we have a relation between L (total length of the fence) and x (length of one side of the garden)
L = 4*x
This is a proportional relation, and 4 is the constant of proportionality.