One side of a solid food block of 10 cm thickness is subjected to a heating medium having a film heat transfer coefficient of 70 W (m² °C)⁻¹. The other side of the food block is being cooled by a medium having a film heat transfer coefficient of 100 W (m² °C)⁻¹. The food block is having a thermal conductivity of 0.2 W (m °C)⁻¹ and the contact area of the block available for heat transfer is 1 m². Heat transfer rate in the block at steady state is 100 J s⁻¹. The temperature difference between the two sides of the block in °C is [round off to 2 decimal places]