Properties of Solids and Liquids - Hard

Two spheres of emissive powers

0.6

and

0.8

and radii

2\,\text{cm}

and

4\,\text{cm}

are heated to

27\,^\circ\text{C}

and

127\,^\circ\text{C}

and placed in a room at

0\,\text{K}

. The ratio of heat radiated per second is