How much longer will it take for sound in air to travel 10km than in water

1 answer

distance = rate x time.
d = 10,000 m
t = solve for this in seconds
r = rate. I found one source that listed the speed of sound in air as approx 340 m/s and another that listed speed of sound in water as approx 1500 m/s. (You can go to google and look these numbers up if you want a more accurate answer.)
Plug in distance and rate and solve for time in each case. Subtract to see how much longer.