Question

Two rods one of aluminium of length having
coefficient of linear expansion a,, and other steel
of length , having coefficient of linear expansion
care joined end to end. The expansion in both the
rods is same on variation of temperature. Then the
value of l1/l1+l2 is​

Answer 1

Answer:

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Explanation:

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Answer 2

Answer:

I'm really sorry I didn't understand the question