Thermal expansion of an aluminum bar

[austindubose]

Homework Statement

Consider a bar of aluminum which is 10 cm X ½ m X 20 m. If the bar undergoes a change in its temperature from 10° C to 20° C, determine the new dimensions of the bar.

Homework Equations

ΔL=αL₀ΔT
α=24x10^-6

The Attempt at a Solution

I understand how the formula works and everything. But my real question is as follows: does thermal expansion occur in all dimensions? Would each dimension increase?

 

[technician]

I don't understand your dimensions of the bar ! and yes... the bar expands in all directions. each height will get higher each width will get wider and each length will get longer