To estimate the distance of Uranus from the Sun, we can look at the average distances for the planets around it.
- Saturn's average distance from the Sun is 9.5 AU.
- Neptune's average distance from the Sun is 30 AU.
Since Uranus is located between Saturn and Neptune, a reasonable estimate for its average distance from the Sun would fall between these two values.
A commonly accepted average distance for Uranus is approximately 19.2 AU. Since this is close to 20 AU, the best answer from the provided options is:
20 AU.