A cylindrical tube 7 m long has inside diameter 12 cm and outside diameter 16 cm. The volume of the metal in the tube is
61600 cm3
56000 cm3
53600 cm3
67600 cm3
The difference between inside and outside surface of a cylindrical tube 14 cm long is 88 sq. cm. If the volume of the tube is 176 cubic cm,find the inner and outer radii of the tube.
A cylindrical tube open at both ends is made of metal. The internal diameter of the tube is 11.2 cm and its length is 21 cm .The metal everywhere is 0.4 cm thick. The volume of the metal used is