Heat And Thermodynamics

A black rectangular surface of area '\(\mathrm{A}\)' emits energy '\(\mathrm{E}\)' per second at \(27^{\circ} \mathrm{C}\). If length and breadth is reduced to \((1 / 3)^{\text {rd }}\) of its initial value and temperature is raised to \(327^{\circ} \mathrm{C}\) then energy emitted per second becomes