A Stationary Ship Generates a Sound Signal at the Bow

Multiple Choice

A stationary ship generates a sound signal at the bow and has a receiver system at the stern of the ship 100 m away.The signal arriving at the stern traveling directly through the air and the signal reflected from the sea bottom arrive at the sensor at the same time.If the velocity of sound in air is 331 m/s and in water is 1435 m/s,calculate the depth of water below the ship.

A) 434 m
B) 422 m
C) 217 m
D) 211 m
E) 192 m