If the insulation resistance of a cable of length 20 km is 2 MΩ, what is the insulation resistance of 100 km cable?

Q. If the insulation resistance of a cable of length 20 km is 2 MΩ, what is the insulation resistance of 100 km cable?

A.            0.2 MΩ

B.            0.4 MΩ

C.            0.6 MΩ

D.            0.8 MΩ

Answer: 0.4 MΩ