Question

If the map scale is 1:50 000 and the length of the farm is 3,5 cm and breadth of the farm is 5 cm on the map, calculate the area in hectares (ha)

Answer 1

The dimensions of the farm in real world:

3.5·50 000 =175 000 cm, or 1750 m;

5·50 000 = 250 000 cm, or 2500 m.

$$A=1750·2500=4375000\text{ m}^2,$$

and since 1 ha is 10 000 square meters, the area is 437.5 ha.