Iron ball 2

What is the mass of the iron ball with a diameter of 1,0 dm? The density of iron is 7870 kg/m3.
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Correct answer:

m =  4.1207 kg

Step-by-step explanation:

D=1 dm m=1:10  m=0.1 m ρ=7870 kg/m3 r=D/2=101/2=10 21=201=0.05 m  V=34 π r3=34 π 2013=34 3.1416 0.0530.0005 m3  m=ρ V=7870 V=7870 0.0005=4.1207 kg



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