The velocity of the streamflow when measured using a current meter at a point A is found to be 5 m/s when the current meter rotates at 50 rev/s and the velocity at another point B measured using same current meter is found to be 3 m/s when the current meter rotates at 40 rev/s. The velocity of the stream at a section 50 m downstream of point B where the same current meter rotates at 60 rev/sec is – (in m/s up to 2 decimal places)