Question

If the actual difference in areas covered by the red and yellow region in reality is 400 sq. cm, what is scale used in the map shown?

Answer 1

Area of each small square = 1 x 1
= 1 sq. cm
Area covered by the red region on the map = 5 x 1
= 5 sq. cm
Area covered by the yellow region on the map = 4 x 1
= 4 sq. cm
Difference between the areas covered on the map = 5 - 4
= 1 sq. cm
Actual difference in areas covered by the red and yellow region = 400 sq. cm
$\therefore$ 1 sq. cm on map = 400 sq. cm in reality
So, the scale used in the map is 1 cm = 20 cm.