Answer:
Explanation:
The formula for the area of a rectangle is
, where w is the width of the rectangle and l is the length of the rectangle.
The question tells us that the length is four times it width. This means that
. Since we are given the length, 4w, and the area, 256, we can plug in these values into our formula for area of a rectangle and solve for the width:



The width of the rectangle is 8 centimeters.
Now that we have the width of the rectangle, we can plug that value into our original equation again to solve for the width:


The length of the rectangle is 32 centimeters.