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The thickness of a hollow metallic cylinder is 2 cm. It is 70 cm long with outer radius of 14 cm. Find the volume of the metel used in making the cylinder assuming that it is open at both the ends Also find its weight if the metal weighdds 8 g per cm3.

Answer

Let is thickness of the cylinder
is outer radius of the cylinder
is inner radius of the cylinder
is height of the cylinder


Now, inner radius is calculated as,

1) Volume of the hollow cylinder is given by,





2) Given wright of the metal,

Let = mass of the cylinder





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