It is proposed to measure the flow rate through a circular pipe by measuring velocity at a single point in order to estimate frictional pressure loss through the pipe. The flow through the pipe was determined to be turbulent. The velocity profile was approximated by the following equation: Where: U(r) = V (1 - 7) Vc = velocity at the centerline R = radius of the pipe r = radial distance from the centerline 1/7 Estimate the radial position from the centerline where the velocity measurement should be taken to estimate the flow rate.