Hydrology

A propeller-type current meter calibration formula is $V = 0.52 N + 0.03$ (where $V$ is flow velocity in $\text{m/s}$ and $N$ is revolutions per second). In a stream measurement, the meter recorded 90 revolutions during an interval of 60 seconds. The measured streamflow velocity in $\text{m/s}$ is ________ (round off to 2 decimal places).