Q11 of 24 Page 236

The inner diameter of a metallic tube of density 7g/cm3 is 2.5 cm. The thickness of the tube is 0.29 cm. Find the weight of the tube if it is of length 30 cm.

Given,


Length of tube (l) = 30cm


Inner radius of tube(r) = 1.25 cm


Outer radius of tube (R) = 1.25 + thickness


= 1.25 + 0.29


= 1.54




=


=



=


=


Volume of metal = Outer volume - Inner volume


= -


=


Also, Mass of metal = Density × volume


= 7 × 24.273 ×


= 534.006g


So, the weight of metal is 534 g (approx.)


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