Two rods having thermal conductivity in the ratio of 5 : 3 having equa – McqOptions

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1.	Two rods having thermal conductivity in the ratio of 5 : 3 having equal lengths and equal cross-sectional area are joined by face to face. If the temperature of the free end of the first rod is \[100{}^\circ C\] and free end of the second rod is \[{{20}^{o}}C\]. Then temperature of the junction is
A.	\[70{}^\circ C\]
B.	\[50{}^\circ C\]
C.	\[50{}^\circ C\]
D.	\[90{}^\circ C\]
Answer» B. \[50{}^\circ C\]

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