Sphere

The surface of the sphere is 12100 cm2, and the weight is 136 kg. What is its density?

Correct result:

h =  1086.6 kg/m3

Solution:

S=12100 cm2→ m2=12100/10000  m2=1.21 m2 m=136 kg  S=4 πr2  r=S4π=1.214⋅ 3.1416≐0.3103 m  V=43⋅ π⋅ r3=43⋅ 3.1416⋅ 0.31033≐0.1252 m3  h=m/V=136/0.1252=1086.6 kg/m3

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