If the external and internal radii of a hollow sphere be 6 cm and 3 cm – InterviewSolution

InterviewSolution

1.	If the external and internal radii of a hollow sphere be 6 cm and 3 cm respectively, then the volume (i.e, the material) of the sphere will beA. 629 cu-unitsB. 792 cu-unitsC. 829 cu-unitsD. 929 cu-units
Answer» The required volume of the sphere `=((4)/(3)pixx6^(3)-(4)/(3)pixx3^(3))` cu. units `(4)/(3)xx(22)/(7)(216-27)` cu.units =`(4)/(3)xx(22)/(7)xx189` cubic.units= 792 cubi.units `therefore` (b) is correct

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