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Assuming the cylinder wall is thin an approximate method to calculate the expansion of circumference is: Let's call the initial circumference, $C_0=2\pi r_0=2\pi* 230mm .$ The change in diameter due to temperature is $$ \ d_c=c_1 - c_0= 2 π r_0 \Delta t *α \quad\\ \rightarrow dc = 2 π r_1 - 2 π r_0 = 2 π r_0 \Delta t* α $$. $\alpha=$ linear expansion ...

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