Question

The total area of cross-section is $0.25m^{2}$ . If the blood is flowing at the rate of $100cm^{3}/sec$ , then the average velocity of flow of blood through the capillaries is :

• A. $4mm/sec$
• B. $400mm/sec$
• C. $0.4mm/sec$
• D. $25mm/sec$

Answer 1

Answer: (C)

Rate of flow $Q=Av$
$v=\frac{Q}{A}=\frac{100 \times 10^{- 6}}{0 . 25}=4\times 10^{- 4}m/s=0.4mm/s$