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A steel scale measures the length of a c...

A steel scale measures the length of a copper wire as `80.0 cm` when both area at `20^(@)C` (the calibration temperature for scale). What would be the scale read for the length of the wire when both are at `40^(@)C`? (Given `alpha_("steel") = 11 xx 10^(-6) per ^(@)C` and `alpha_("copper") = 17 xx 10^(-6) per^(@)C`)

A

80.0096 cm

B

80.0272 cm

C

1 cm

D

25.2 cm

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The correct Answer is:
A
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