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Two rods A and B of identical dimensions are at temperature 30°C. If A is heated upto 180°C and B upto T°C, then the new lengths are the same. If the ratio of the coefficients of linear expansion of A and B is 4 : 3, then the value of T is

1. 200°C
2. 270°C
3. 230°C
4. 250°C

Correct answer: 230°C

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