Final answer:
The area of the football pitch is 3600 m² and the cost of installing the pitch is $108,000.
Step-by-step explanation:
To find the area of a rectangle, we multiply its length by its width. In this case, the length of the football pitch is 90 m and the width is 40 m. So, the area of the pitch is 90 m * 40 m = 3600 m2.
To calculate the cost of installing the pitch, we need to multiply the area of the pitch by the cost per square meter. As given, the cost per square meter is $30. So, the cost of installing the pitch would be 3600 m2 * $30/m2 = $108,000.