Iron pole

What is the mass of pole with the shape of a regular quadrilateral prism with a length of 1 m and a cross-sectional side length of a = 4.5 cm make from iron with density ρ = 7800 kg/m³?

Correct result:

m =  15.795 kg

Solution:

ρ=7800 kg/m3 c=1 m a=4.5 cm m=4.5/100  m=0.045 m V=a2 c=0.0452 1=81400000.002 m3  m=ρ V=7800 0.002=3159200=3159200 kg=15.795 kg



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