Cross-section 37443

What is the mass of an iron bar 1.5 m long, the cross-section of which is a rhombus with side a = 45 mm and a corresponding height of 40 mm? Iron density ρ = 7.8 g / cm3? What is the surface of the iron rod?

Correct answer:

m =  21.06 kg
S =  0.2736 m2

Step-by-step explanation:

c=1.5 m a=45 mm m=45:1000  m=0.045 m v=40 mm m=40:1000  m=0.04 m ρ=7.8 g/cm3 kg/m3=7.8 1000  kg/m3=7800 kg/m3 S1=a v=0.045 0.04=50009=0.0018 m2  V=S1 c=0.0018 1.5=1000027=0.0027 m3  m=ρ V=7800 0.0027=21.06 kg
S2=4 a c=4 0.045 1.5=10027=0.27 m2  S=S2+2 S1=0.27+2 0.0018=0.2736 m2

Did you find an error or inaccuracy? Feel free to write us. Thank you!

Tips for related online calculators
Do you know the volume and unit volume, and want to convert volume units?
Tip: Our Density units converter will help you convert density units.
Do you want to convert mass units?

You need to know the following knowledge to solve this word math problem:

We encourage you to watch this tutorial video on this math problem: video1   video2   video3

Related math problems and questions: