Using the given information:
Area = 90
Length = 30
Height = ?
Area of a rectangle = length x height
You already know the area and length, so rearrange the equation to find the height.
[tex]Height =[/tex] [tex]\frac{Area}{Length}[/tex]
Substitute in the known values (area and length).
[tex]Height = \frac{90}{30}[/tex]
Height = 3 inches
