Iron sheet 50 cm X 20 cm is heated throu...

Iron sheet 50 cm X 20 cm is heated through `100^@C`. If `prop = 12 xx 10^-6//^@C` then chnage in area is

`2.4 cm^2`

`3.4 cm^2`

`4.4 cm^2`

`5.4 cm^2`

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