Distance between two places is 200 km. `alpha` a of steel is `12xx10^(-6)//""^(@)C`. Total space that must be left between steel rails to allow for a change of temperature from `36^(@)F` to `117^(@)F` is

Options

A. 1.08 km
B. 0.108 km
C. 10.8 km
D. 0.0108 km

Answer

B