In the shown planar frame made of thin uniform rods, the length of sections AB and EF is L_1 and its thermal coefficient of expansion is alpha_(1). The length of section CD is L_(2) and its thermal coefficient of expansion is alpha_(2). CB and DE are of same length having linear thermal coefficient of expansion alpha_(2). It is given that (alpha_1)/( alpha_2) = 3.5 Points A, B, E and F reside on same line, that, is, sections, AB and EF overlap. Then find the ration of (I_2)/( I_1) for which distance between end A and end F remain the same at all temperature.

In the shown planar frame made of thin uniform rods, the length of sec

1.	In the shown planar frame made of thin uniform rods, the length of sections AB and EF is L_1 and its thermal coefficient of expansion is alpha_(1). The length of section CD is L_(2) and its thermal coefficient of expansion is alpha_(2). CB and DE are of same length having linear thermal coefficient of expansion alpha_(2). It is given that (alpha_1)/( alpha_2) = 3.5 Points A, B, E and F reside on same line, that, is, sections, AB and EF overlap. Then find the ration of (I_2)/( I_1) for which distance between end A and end F remain the same at all temperature.
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