Q. 4

2.2 cubic dm of brass is to be drawn into a cylindrical wire 0.25 cm in diameter. Find the length of the wire.

Answer :

Given: 2.2 dm3 of brass is to be drawn into a cylindrical wire 0.25 cm in diameter.

Diameter of cylindrical wire = 0.25cm


Radius of wire, r =


Let length of wire be h


Volume of the cylinder = πr2h


Volume of brass of 2.2dm3 is equal to volume of cylindrical wire




h = 448m


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