construct a hollow metallic sphere of internal diameter 10 m and external diameter 13 m . find volume
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construct a hollow metallic sphere of internal diameter 10 m and external diameter 13 m . find volume
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external radius=6.5m
volume of sphere=4/3πr³
=4/3π(R³-r³)=4/3×22/7(6.5³-5³)
=627m³
internal volume =4/3×π×6.5×6.5×6.5= 543.6 cm^3
external volume=4/3×π×5×5×5=1150.35cm^3
external volume - internal volume
volume = 627.35cm^3