It is required to heat the oil to 300°C for frying purpose. A long laddle is used in frying pan. The section of the laddle is 5 mm x 18 mm. The surrounding air is at 30°C and the thermal conductivity...

It is required to heat the oil to 300°C for frying purpose. A long laddle is used in frying pan. The section of the laddle is 5 mm x 18 mm. The surrounding air is at 30°C and the thermal conductivity is 205 W/mK. If temperature at a distance of 380 mm from the oil should not exceed 40°C, determine convective heat transfer coefficient.