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An iron rod of length 50 cm is joined at...

An iron rod of length 50 cm is joined at an end to an aluminum rod of length 100 cm. All measurements refer to `20^(@)C` . The coefficients of linear expansion of iron and aluminum are `12xx10^(-6)//^(@)C and 24xx10^(-6)//^(@)C`, respectively. The average coefficient of expansion of composite system is :

A

`36 xx 10^(-6).^(@)C^(-1)`

B

`12 xx 10^(-6).^(@)C^(-1)`

C

`20 xx 10^(-6).^(@)C^(-1)`

D

`46 xx 10^(-6).^(@)C^(-1)`

Text Solution

Verified by Experts

The correct Answer is:
C
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