Question

Blood is flowing at the rate of $200c{m}^3/s$ in a capillary of cross sectional area $0.5m^2$. The velocity of flow in mm/s is:

• A. 0.1
• B. 0.2
• C. 0.3
• D. 0.4

Answer 1

The correct option is D 0.4

Volume flow rate = Velocity $\times$ Cross sectional area
$200c{m}^3/s=V\times 0.5m^2$
$200\times {10}^{-6}{m}^3/s=V\times 0.5m2$
$V=400\times {10}^{-6}m/s$
$V=0.4mm/sec[\because 1m={10}^{3}mm]$