An aluminium and steel rods having same lengths and cross-sections are joined to make total length of 120 cm at 
. The coefficient of linear expansion of aluminium and steel are 
and 
, respectively. The length of this composite rod when its temperature is raised to 
, is 
cm .
Text Solution
Verified by ExpertsThe correct answer is:
B
1. Total length at 
, each rod 
Total expansion 
Final length 
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