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A concrete sidewalk is constructed between two buildings on a day when the temperature is 25C. As the temperature rises to 38C, the slabs expand

A concrete sidewalk is constructed between two buildings on a day when the temperature is 25°C. As the temperature rises to 38°C, the slabs expand by a length of 0.00094m. What is the original length of the sidewalk at 25 °C?

Assume the linear thermal expansion coefficient is 12x10° c

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