EXPLANATION
Let's see the facts:
Velocity of flow = unknown
Rate of flow = 0.75 cfs
Cross-sectional area of the pipe= 8 inches
We need to convert the 8 inches to feet units:
12 inches --> 1 feet
8 inches ---> 8/12 = 2/3 = 0.67 feet
Applying the given equation:

Hence, the solution is Velocity of flow= 1.125 fps