A steel tape is callibrated at 20^(@)C. ...

A steel tape is callibrated at `20^(@)C`. When the temperature of the day is `-10^(@)C`, the percentage error in the measurement with the tape is `(alpha=12" "10^(-6)//""^(@)C)`

`3.6%`

`0.36%`

`0.18%`

`0.036%`

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