A Bridge Is Made with Segments of Concrete 50 M $\degree$

Multiple Choice

A bridge is made with segments of concrete 50 m long.If the linear expansion coefficient is 12 *10 ^{- 6} ( $\degree$ C) ^{- 1},how much spacing (in cm) is needed to allow for expansion during an extreme temperature change of 150 $\degree$ F?

A) 10
B) 2.5
C) 7.5
D) 5.0
E) 9.5