Class 11 NEET Physics Properties of Matter Questions

A slab of stone of area 0.36m2 and thickness 0.1m is exposed on the lower surface to steam at 100°C.A block of ice at 0°C rests on the upper surface of the slab.In one hour 4.8 kg of ice is melted. The thermal conductivity of slab is
(Given latent heat of fusion of ice =3.36×105Jkg−1)