The length of each rail is 10m. The line...

The length of each rail is 10m. The linear expansion of steel is `12xx10^(-6)//""^(@)C` and range of variation of temperature at the given place is `15^(@)C`. The gap to be left between the rails is

0.0018 m

0.0012 m

0.00022 m

0.05 m

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