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A copper plate has an area of 250 cm^2 a...

A copper plate has an area of 250 `cm^2` at `0^(@)` C. Calculate the area of this plate at `60^(@)C`.Given coefficient of linear expansion of copper=`1.7xx10^(-5)^(@)`C

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`A=2.5xx10^(-2)m^2,/_\theta=60^(@)C`
`prop_A=2prop_1=3.4xx10^(-5)K^(-1)`
`:. A_2=A_1(1+2)(prop)(60)`
`A_2=2.5xx10^(-2)(1+3.4xx60xx10^(-5))`
`=2.505xx10^(-2)m^2`
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