Question

The longest runway at a airport has a shape of a rectangle and a area of 2,165,400 square feet this runway is 180n feet wide how long is the runway

Answer 1

The area of a rectangle is given by the product of its length and width.
  A = l·w
Then the lenght is found by dividing this equation by w to get
  l = A/w
Filling in the given information, we can find the length of the runway as
  l = (2165400 ft²)/(180 ft)
  l = 12,030 ft