On a plane map with a scale of 1:4000, the bottom of a triangular vegetable field is 8 cm and the height is 5.5 cm. How many square meters is the actual area of this vegetable field?

On a plane map with a scale of 1:4000, the bottom of a triangular vegetable field is 8 cm and the height is 5.5 cm. How many square meters is the actual area of this vegetable field?

The actual length of the bottom edge is 4000 * 8 = 32000cm = 320m
The actual height is 5.5 * 4000 = 22000cm = 220m
The area is 320 * 220 / 2 = 35200 square meters