Answer:
7.5 cm.
Explanation:
The height of a rectangle can be calculated using the rectangle's base and area using the following formula:
height = area / base
This formula can be derived from the formula for the area of a rectangle:
area = base x height
By rearranging this formula, we get:
height = area / base
Therefore, if we know the area and base of a rectangle, we can use this formula to calculate its height.
1) rewrite
Height = are / base
2) plug in
h = 30 cm / 4 cm
3) solve (divide)
height = 7.5 cm
Therefore, the height of the rectangle is 7.5 cm.