How fast are you travelling if you are moving at the speed of sound at sea level?

Answers:
Speed of sound doesn't depend on altitude (or air pressure), but on the square root of temperature expressed in Kelvin degrees (Kelvin = Celsius + 273), multiplied by a constant. With a temperature of 20 degrees Celsius (293 degrees Kelvin that is) the speed of sound is about 340 meters per second.

340 m.s-1 (1225 km.h-1 or 761 mph)

1225 km or 761 mph

between 330 and 340 mps (meters per second)

200 mph

If you are under the water, you travel at 4,800 feet per second.

If the air temporature is 68deg: F, then it is 750mph.

1100 feet per second.

Already answered.
Just to remember that salty water have different velocity than others.

300 000km per second

Faster than the speed limit in my town
so STOP IT!

330 m/s

330 m/sec