How to find the thermal expansion coefficient?

da_coolest

following is an example question i found on a lecture slide. I need some explanation to understand it.

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In this example, Is it possible to get the thermal expansion coefficient from the data given in the question? if then, how to do that?

Astronuc

The thermal expansion coefficient α is given, α = 20 x 10^-6 °C^-1.

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da_coolest	How to find the thermal expansion coefficient? Tweet following is an example question i found on a lecture slide. I need some explanation to understand it. Uploaded with ImageShack.us In this example, Is it possible to get the thermal expansion coefficient from the data given in the question? if then, how to do that?

Astronuc Admin	The thermal expansion coefficient α is given, α = 20 x 10^-6 °C^-1.