Physics

Problem

An aluminium rectangle measuring

30\,\text{cm}\times15\,\text{cm}

is heated from

25\,^{\circ}\text{C}

225\,^{\circ}\text{C}

. Take

\beta_{\text{Al}} = 48\times10^{-6}\,\text{K}^{-1}

. The new area of the plate is approximately a)

452.16\,\text{cm}^2

445.68\,\text{cm}^2

454.32\,\text{cm}^2

454.86\,\text{cm}^2