A hollow spherical shell is made of a metal of density 4.5 g per cm2 .If tits internal and external radii are 8 cm & 9 cm respectively, find the weight of the shell.
let the internal radius of the hollow shell be r = 8 cm
let the external radius of the hollow shell be R = 9 cm
therefore the volume of the spherical shell V =
weight of 1 cubic cm = 4.5 gm
thus the weight of the spherical shell =
hope this helps you
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- r=internal radii= 8
- R = external radii=9
- volume of hollow sphere=4/3.22/7.(R3 - r3)
- putting value of R and r
- weight of 8184/7 cm3 = 8184/7.4.5=5261.1 gms.