Question
66 cubic centimetres of silver is drawn into a wire 1mm in diameter .The length of the wire in metres will be :
Answer: Option A
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Let the length of the wire be h
Radius = `1/2` mm = `1/20 cm ` Then,
`22/7 xx 1/20 xx 1/20 xx h = 66`
`hArr h = ((66 xx 20 xx 20 xx 7)/(22))` = 8400 cm = 84 m.
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