A flat plate, 2m × 0.4m is set parallel to a uniform stream of air (density 1.2kg/m3 and viscosity 16 centistokes) with its shorter edges along the flow. The air velocity is 30 km/h. What is the approximate estimated thickness of boundary layer at the downstream end of the plate?
a. 1.96 mm b. 438 mm
c. 13.12 mm d. 9.51 mm