Question

the outer diameter of a metallic tube is 14 cm and the thickness of the tube is 1 cm find the weight of 2 cm long tube if the density of the metal is 7 gram

Answer 1

inner diameter=14-1=13cm. inner radius =13/2 outer diameter=14 outer radius=7 http. of tube=2 cm ::::; vol. of metal= vol. of outer tube- vol. of inner tube= pie( R^2- r^2) h
= 22/7(7-6.5)× 2 =22/7×.5×2= 22/7cm^3 weight of metal= 22/7×7 =22 gems.

Answer 2

hello friend

R= 14/2
R= 7
R'=(14-1)/2
R'= 6.5

vol of metal= π(R^2-R^2)×h
vol of metal 22/7×.5×2×70

density = 22 gm