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A strain gauge has unstrained resistance of 10002 and a gauge factor of 2. It is bonded to a beam of a given length

A strain gauge has unstrained resistance of 10002 and a gauge factor of 2. It is bonded to a beam of a given length and cross-sectional area. When a load of 2 kN is applied to the strain gauge, the resistance of the strain gauge changes by 0.00892 and the length by 2 m. Given that the Young Modulus of steel is 20GN/m, determine the original length of the steel beam and its cross-sectional area.

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