900g/m2 = 0.9kg/m2
Area = 60 * 20 = 1200m2.
* * * Rice can be harvested.
1200 * 0.9 =1080kg
2. A rectangular soybean field, 200 meters long and 100 meters wide, receives * * * soybeans 10400 kilograms, and how many kilograms of soybeans are produced per hectare on average?
Area 200 * 100 =20000m2 = 2 hectares.
The average soybean yield per hectare is 10400/2=5200 kg.
3. The bottom of the isosceles triangle is 25cm long, and one waist is 3cm shorter than the bottom. What is the circumference of this triangle?
Waist circumference 25-3=22 cm
The perimeter of the triangle =25+22*2=69 cm.