The diameters of the main rotor and tail rotor of a single-engine helicopter are 7.59 m and 1.05 m, respectively. The respective rotational speeds are 443 rev/min and 4,120 rev/min. Calculate the speeds of the tips of both rotors. main rotor m/s tail rotor m/s Compare these speeds with the speed of sound, 343 m/s. main rotor= sound tail rotor V sound