Given,
The radius of the wheel, r=6 ft=1.83 m
The angular speed of the wheel, ω=15 rev/min=1.57 rad/s
The speed of the current will be equal to the linear speed of the wheel.
The linear speed of the wheel is given by,
[tex]v=r\omega[/tex]On substituting the known values,
[tex]\begin{gathered} v=1.83\times1.57 \\ =2.87\text{ m/s} \end{gathered}[/tex]Thus the speed of the river currents is 2.87 m/s
