a length of #8 copper wire (radius = 1.63 mm) has a mass of 24.0 kg and a resistance of 2.061 ohm per km. what is the overall resistance of the wire

Verified Answer :


m = pVol

p : copper density 

Vol: volume

Vol = Al

A: area

L: length

m = p A L

L = m/pA

To find the total resistance

Rtotal = R per Km
L/1000 

Actually I think the question is missing the copper density.