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A rectangular steel plate weighs 128.7 kg, 2.2 meters long and 1.5 meters wide. Each cubic decimeter of steel weighs 7.8 kg. How many decimeters thick is this steel plate?
128.7÷7.8=16.5m
16.5 ÷ (2.2 × 1.5) = 5m
5 meters thick
That's 50 decimeters
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There is a rectangular steel plate, which is 2 meters long, 0.2 meters wide and 0.05 meters thick. What is the volume of this steel plate?
There is a rectangular steel plate which is 2 meters long, 0.2 meters wide and 0.05 meters thick. What is the volume of this steel plate? If each cubic decimeter steel plate weighs 7.8 kg, how many kg does this steel plate weigh? Please answer in 5 minutes,
Volume 2x0.2x0.05 = 0.2m3
Weight 0.2x1000x7.8 = 1560kg
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-The third power of (3 - / 3) is - 0.1
-(0.5)²+1/4-|-3²-9|-(-2/3)³*16/27
=-(1/2)²+1/4-|-18|-(-8/27)*16/27
=-14/+1/4+18+8/27*16/27
=18+128/729
=18 128 / 729
Square of 3 × 4 + cube of 80 ／ 5 ／ 2-27
Square of 3 × 4 + cube of 80 ／ 5 ／ 2-27
=3x16+16÷8-27
=48+2-27
=23
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