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A parallelogram steel plate is 1.6 meters long at the bottom and 0.8 meters high. The mass of this kind of steel plate is 39 kg per square meter. How many kg does this steel plate weigh
Parallelogram area = 1.6 * 0.8 = 1.28 square meters
Weight = 1.28 * 39 = 49.92 km
About = 50 km
This steel plate weighs about 50 kg
A parallelogram steel plate with a bottom length of 0.8 meters and a height of 4 decimeters was recovered from the waste purchase station. It is known that this kind of steel plate weighs 12 kg per square decimeter, and the purchase price is per 1000 yuan
A parallelogram steel plate with a bottom length of 0.8 meters and a height of 4 decimeters was recovered from the scrap purchasing station. It is known that this kind of steel plate weighs 12 kg per square decimeter, and the purchasing price is 2.5 yuan per kg. What is the purchasing price of this steel plate?
Hello, jinglulu
the measure of area:
0.8 m = 8 decimeters
8 × 4 = 32 (square decimeter)
Weight:
32 × 12 = 384 (kg)
Price:
384 × 2.5 = 960 yuan
A parallelogram rigid plate with an area of 6 / 7 square meters. Use 1 / 4 of this steel plate as a tool. How many square meters of steel plate do you need to make this tool
6 / 7 × 1 / 4 = 3 / 14 M2
A: it takes 3 / 14 square meters of steel plate to make this tool
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