In a paper drying process, the paper moves on a conveyor belt at 0.2 m/s, while dry air from an in-line array of round jets (Figure 7.17 b) impinges normal to its surface. The nozzle diameter and pitch are D = 20 mm and S = 100 mm, respectively, and the nozzle-to-paper separation is H = 200 mm. Air exits the nozzle at a velocity and temperature of 20 m/s and 300 K, while the wet paper is maintained at 300 K. In kg/s ∙ m², what is the average drying rate of the paper?