A remotely operated vehicle surveys a straight, flooded tunnel. The vehicle is 32.0 m from the tunnel entrance and sends an ultrasound pulse towards the closed end of the tunnel.
The vehicle displays a distance of 84.0 m to the closed end using a sound speed of 1500 m/s. The actual speed of sound in the water is 1470 m/s.
Calculate the length of the tunnel from the entrance to the closed end.