Two rods 1 and 2 of length 
and 
, thermal conductivities 
and 
are joined end to end. The area of cross-sectional of each rod be 
. This composite rod is connected with another rod 3 of length 
and conductivity 
. The area of cross-section of the rod 3 is 2 A. If the rod 3 conducts the heat two times that through the other rods, find the value of 
.
Text Solution
Verified by ExpertsThe correct answer is:
C
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