That's a tricky question! It's not quite accurate to say a planet orbits the sun at a *constant* speed of 110,000 kph. Here's why:

* Orbital Speed Varies: Planets in our solar system have elliptical orbits, meaning they're not perfect circles. As a planet gets closer to the sun, its gravitational pull increases, causing it to speed up. When it's farther away, it slows down.

* Average Speed: The speed you mentioned (110,000 kph) is likely an average orbital speed. It doesn't reflect the planet's speed at every point in its orbit.

To help you figure out which planet it might be, let's consider average orbital speeds:

* Mercury: About 170,000 kph

* Venus: About 126,000 kph

* Earth: About 107,000 kph

* Mars: About 86,000 kph

Based on this, the planet you're likely thinking of is Venus. It's average orbital speed is closest to 110,000 kph.