Question

plz find this answer​

Answer 1

We know that resistance R=

A

ρ×l

, here, l=1km=1000m,A=0.02cm

2

,ρ=1.62×10

−8

Ω−m

=

2×10

−2

×10

−4

1.62×10

−8

×1000

=8.1Ω