Air at 20°C flows over a 4-m-long and 4.6-m-wide surface of a plate whose temperature is 80°C with a velocity of 5.7 m/s

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Air at 20°C flows over a 4-m-long and 4.6-m-wide surface of aplate whose temperature is 80°C with a velocity of 5.7 m/s.Determine the rate of heat transfer from the laminar flow region ofthe surface. (For air, use k = 0.02735 W/m·°C, Pr = 0.7228, v=1.798 × 10−5 m2/s.)
The rate of heat transfer from the laminar flow region of thesurface is