Question

An iron rod of length 50cm is joined end to
end to an aluminium rod of length 100cm. All
measurements refer to 20°C. The coefficients
of linear expansion of iron and aluminium are
12x10-6°C and 24x10-6/°C respectively. The
average coefficient of composite rod is
1) 20 x 10-6/°C 2) 36 x 10-6/°C
3) 12 x 10-6/°C 4) 48 x 10-6/°C


please guys do it fast ​

Answer 1

Answer:

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Explanation:

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