Answer:
The area of the grass is 775 square meters.
Step-by-step explanation:
Area of a Rectangle
A given rectangle of width W and length L has an area of:
A = WL
The school assembly ground has dimensions of 30 m by 30 m, thus its area is:
Aa= 30 m * 30 m = 900 square meters
Inside of it, there is a concrete rectangle of 25 m by 5 m. The area of that rectangle is:
Ac= 25 m * 5 m = 125 square meters
The area of the grass is the difference between those areas:
Ag = Aa - Ac
Ag=900 square meters - 125 square meters
Ag = 775 square meters.
The area of the grass is 775 square meters.
