An aluminium measuring rod, which is cor...

An aluminium measuring rod, which is correct at `5^@C` measures the length of a line as 80 cm at `45^@C` If thermal coefficient of linear expansion of aluminium is `2.50xx10^(-4)//^@C`, the correct length of the line is:

80.08 cm

79.92 cm

81.12 cm

79.62 cm

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