Question

4. A cube of metal of side 2.2 cm is melted to form a cylindrical wire of radius 1mm.find the length of the wire so obtained.
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Answer 1

Answer:

2.2 cm = 22 mm

Volume of cube = Volume of wire

                 Side³ = πr²L Where L = length of wire

                 22³ = 22/7 x 1² x L

             10648 = 22/7 L

L = 10648 x 7/22

   L = 3388 mm OR 3.388 m