expansion of a steel rod

Question

A steel rod expands by 0.2500% for every 100 degree rise in temp.  How long would a 63.86cm rod be after it's subject to 100 degree rise in temp?

Answer 1

A steel rod expands by 0.2500% for every 100 degree rise in temp.  How long would a 63.86cm rod be after it's subject to 100 degree rise in temp?

 

0.0025 * 63.86 = 0.15965   <--  This is how much the rod expands.

 

Add this to the original rod length to get the total length.