A long cylinder of rectangular cross section, 5 cm high and 30 cm long, is immersed in

Question:

A long cylinder of rectangular cross section, 5 cm high and 30 cm long, is immersed in water at 20°C flowing at 12 m/s parallel to the long side of the rectangle. Estimate the drag force on the cylinder, per unit length, if the rectangle
(a) Has a flat face or
(b) Has a rounded nose.