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Question

Three rods made of the same material and having same cross-sectional area but different lengths 10cm, 20 cm and 30 cm are joined as shown. The temperature of the joint is:

  1. 20°C    
  2. 23.7°C    
  3. 16.4°C    
  4. 18.2°C    

The correct answer is: 16.4°C

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