Area of the margin is 244 cm²
Area = Length x Width
In this scenario, two Areas will be considered to get the area of the margin.
1st set of measurement will be the original measurement of 40 cm by 25 cm.
2nd set of measurement will be the measurement less 4 cm for the margin resulting to 36 cm by 21 cm.
A₁ = 40 cm * 25 cm
A₁ = 1000 cm²
A₂ = 36 cm * 21 cm
A₂ = 756 cm²
Area of the margin = A₁ - A₂
Area of the margin = 1000 cm² - 756 cm² = 244 cm²
