Iron ball

Calculate the radius of an iron ball with a density of 7.8 g/cm3 and a mass of 7 kg.

Final Answer:

r =  5.9837 cm

Step-by-step explanation:

m=7 kg g=7 1000  g=7000 g ρ=7.8 g/cm3  m= ρ V  V=m/ρ=7000/7.8=3935000897.4359 cm3  V = 34 π r3  r=34π3 V=34 3.14163 897.4359=5.9837 cm



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