Two research technicians are working on a deep-space supply…

Twо reseаrch techniciаns аre wоrking оn a deep-space supply station. To check the speed of incoming cargo pods, they use an acoustic calibration system inside a long pressurized docking tunnel. The speed of sound in the tunnel is the same as the speed of sound in air. One technician remains stationary inside the tunnel and activates a speaker that emits a steady 305 Hz tone. A cargo pod moves toward the docking station through the tunnel while emitting the same 305 Hz tone from an identical speaker mounted on its hull. As the pod approaches, the stationary technician hears a beat frequency of 8 beats per second. Assuming that the speed of sound in air is 343 m/s, what is the speed of the cargo pod?