Question
2.2 cubic dm of lead is to be drawn into a cylindrical wire 0.50 cm in diameter . Find the length of the wire in metres .
Answer: Option C
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Let the length of the wire be h metres , Then ,
`pi xx ((0.50)/(2 xx 100))^2 xx h = 2.2/1000`
`hArr h = (2.2/1000 xx (100 xx 100)/(0.25 xx 0.25) xx 7/22)` = 112 m.
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