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