Youngs Modulus

Two wires are made of the same material and have the same volume. The first wire has a cross-sectional area and the second wire has a cross-sectional area . If the length of the first wire is increased by on applying a force , how much force is needed to stretch the second wire by the same amount?

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The maximum elongation of a steel wire of length if the elastic limit of steel and its Young's modulus, respectively, are and is:
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