Three rods of equal length 
are joined to form an equilateral triangle 
is the mid-point of 
. Distance 
remains same for small change in temperature. Coefficient of linear expansion for 
and 
is same, i.e. 
but that for 
is 
. Then,
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
D
In 
Neglecting 
and 
, we get
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