The thickness of a metallic tube is 1cm and its outer radius is 11cm . find the mass of such a 1 metre long tube, if the density of the metal is 7.5 g per cm³.
Please answer it.(. ❛ ᴗ ❛.)
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Answer:
Inner radius,r=11/2=5.5cm
thickness=1cm
so,outer radius,R=5.5+1=6.5cm
height,h=1m=100cm
volume=pi×(R^2-r^2)×h
=22/7×(6.5^2-5.5^2)×100
=22/7×(31.0-10.0)×100
=22/7×21.0×100
=6600
since,density=7.5gm/cm^3
also,weight=volume×density
weight=6600/5.5×7.5gm
=9000gm
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