There is a rectangular wheat field, 900 meters long and 400 meters wide, with a total yield of 194400 kg of wheat. How many kg of wheat are harvested per hectare on average?

There is a rectangular wheat field, 900 meters long and 400 meters wide, with a total yield of 194400 kg of wheat. How many kg of wheat are harvested per hectare on average?

Wheat field area = 900 * 400 = 360000 square meters = 36 hectares
194400/36=5400
The average wheat yield per hectare is 5400 kg

A parallelogram wheat field, 215 meters at the bottom, receives 1260 kg of wheat in this field. What is the area of this wheat field?
How many kilos of wheat are harvested per hectare?

Area = 215 × 20 = 4300 (M2) = 0.43 (HA)
Average wheat yield per hectare: 1260 △ 0.43 ≈ 2930 (kg)

A triangle nursery is 200 meters long at the bottom and more than 40 meters high. How many square meters is the area of this nursery? How many hectares is it?

Area of nursery triangle = bottom * height / 2
H = 200 / 2 + 40 = 140m
Area = 200 * 140 / 2 = 14000 square meters
14000 sq m = 1,4 ha