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In the construction of a flyover, steel ...

In the construction of a flyover, steel girders of length 12 m are used to place one after another. How much gap should be left between the two at their junction so that in summers whenpeak temperature is about `48^(@)C`, there should not be any compresion. Given that the construction is done in peak winters when temperature is `18^(@)C`. Given that the coefficient of linear expansion of steel is `1.1xx10^(-5).^(@)C^(-1)`.

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