How long does it take to get to Saturn from earth at the speed of sound?

Answer 1

This question is complicated by two factors.

For one, Saturn is not at a fixed distance from Earth, so the answer would be a range rather than a specific amount of time.

But more importantly, there's no fixed speed of sound the way there is for light. The speed of sound is determined by the density of the substrate which the wave is traveling through, say water or air. Even on Earth, the speed of sound through air will vary by temperature and altitude. Since there's nothing in space for the waves to propagate through, sound simply doesn't travel between Earth and Saturn; it has no speed.

For the sake of providing an answer, though, let's pretend that space is actually air of the density of that at sea level on Earth. And that Saturn and Earth are at their closest, and stay still. If this were the case, it would take something like:

111 years

273 days

14 hours