A hollow spherical shell is made of a metal of density If its internal and external radii are 8 cm and 9 cm respectively, find the weight of the shell.
Given,
Internal radius of sphere (ri) = 8 cm
External radius of sphere (re) = 9 cm
Volume of shell = (external volume – internal volume)
=
Weight of sphere = 909.33 × 4.5 = 4092 gm = 4.092 kg