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Two rods having thermal conductivity in ...

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^(@)C` and free end of the second rod is `20^(@)C` . Then temperature of the junction is

A

`70^(@)C`

B

`50^(@)C`

C

`50^(@)C`

D

`90^(@)C`

Text Solution

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The correct Answer is:
A
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