# Question #9c6a4

##### 1 Answer

Jan 29, 2015

The lenght of the railroad at 40°C is:

The formula that we need is the thermal dilatation formula:

where

So, in this case:

So:

Jan 29, 2015

The lenght of the railroad at 40°C is:

The formula that we need is the thermal dilatation formula:

where

So, in this case:

So: