A piece of steel has a length of 30 cm a...

A piece of steel has a length of 30 cm at `15^(@)C`. At `90^(@)C` its length increase by 0.027 cm. Its coefficient of linear expansion is

`15xx10^(-6)//""^(@)C`

`12xx10^(-6)//""^(@)C`

`15xx10^(-6)//""^(@)C`

`20xx10^(-6)//""^(@)C`

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AAKASH SERIES-THERMAL PROPERTIES OF MATTER-EXERCISE-2

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