The rigid bar AB of negligible weight is supported by a pin at O. When the two steel rods are attached to the ends of the bar, there is a gap D between the lower end of the left rod and its pin support at C. After attachment, the strain in the left rod is 1:5 × 103. What is the length of the gap ∆? The cross-sectional areas are 300 mm2 for rod AC and 250 mm2 for rod BD. Use E = 200 GPa for steel.
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