The flow of blood in a large artery of a anesthetized dog is diverted through a ventruimeter. The wider part of the meter has a cross-sectional area equal to that of the artery, i.e., 10 mm2. The narrower part has an area 5 mm2. The pressure drop in the artery is 22 pa. Density of the blood is 1.06 × 103 kg m-3. The speed of the blood in the artery is