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The first angle of a triangle is three times the second angle, and the third angle is 20 degrees larger than the sum of the two angles. Find the degree of the three angles
Let the second angle be x, then the first angle is 3x and the third angle is 3x + X + 20; then x + 3x + 4x + 20 = 180; the solution is x = 20; the first angle is 3 * 20 = 60 degrees; the third angle is 20 + 60 + 20 = 100 degrees
A trapezoidal paddy field is 50 meters long at the top and 82 meters long at the bottom, and 30 meters high. It can harvest 5300 kg of rice per hectare. This paddy field can harvest more rice per day
Paddy field area (50 + 82) * 30 / 2 = 1980 M2 = 0.198 ha
Rice harvested: 0.198 * 5300 = 1049.4kg
A trapezoidal paddy field is 65 meters long at the top, 85 meters long at the bottom and 48 meters high. This year, 2700 kilograms of rice have been harvested in this field. How many kilograms of rice have been harvested per hectare on average
Hello
Paddy field area = (65 + 85) × 48 △ 2 = 3600 (M2) = 0.36 (HA)
Average rice yield per hectare = 2700 △ 0.36 = 7500 (kg)
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