Iron sphere

Iron sphere has weight 100 kg and density ρ = 7600 kg/m3. Calculate the volume, surface, and diameter of the sphere.

Correct answer:

V =  13.1579 dm3
D =  2.9291 dm
S =  26.9531 dm2

Step-by-step explanation:

m=100 kg h=7600 kg/m3 m=hV V1=hm=7600100=7610.0132 m3 V=V1 dm3=V1 1000  dm3=0.0132 1000  dm3=13.158 dm3=19250 dm3=13.1579 dm3
V=34πr3 r=3V 4π3=313.1579 4 3.141631.4645 dm D=2 r=2 1.4645=2.9291 dm
S=4π r2=4 3.1416 1.46452=26.9531 dm2

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