Iron ball

The iron ball has a weight of 100 kilograms. Calculate the volume, radius, and surface if the iron's density is h = 7.6g/cm3.

Correct result:

V =  13.1579 dm3
r =  1.4645 dm
S =  26.9531 dm2

Solution:

m=100 kg h=7600 kg/m3  m=hV  V1=m/h=100/7600=1760.0132 m3  V=V1 dm3=V1 1000  dm3=0.0132 1000  dm3=13.158 dm3=13.1579 dm3
V=43 π r3  r=V 34π3=13.1579 34 3.14163=1.4645 dm
S=4π r2=4 3.1416 1.46452=26.9531 dm2



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