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A copper rod of diameter 1 cm and length 8m is drawn into a wire a length of 18•4m of uniform thickness find the thickness of the wire

Posted by Chandan Kumar 6 years ago

CBSE > Class 10 > Mathematics

1 answers

Siva Santosh 6 years ago

D=1cm

R=1/2cm

Length =height=8m=800cm

Pir2h=pi*1/2*1/2*800=200pi

Length of wrie =18.4m=1840cm

Pir2h=1840r2pi

Atq

200pi=1840r2pi

R2=200/1840

R2=1/9(aprox)

D=2/3(aprox)

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