It takes about a year to fly around the world, but that is skipping the all the terrain and ocean. Riding a horse would be merely impossible, my guess would be about 15-25 years.
around to ten years
they would die before they finished
around two years
You can't drive around the earth because it isn't all land, but has water/oceans.
24 hours
As long as it takes for you to master the art of riding a horse.
At 5mph, 10 hours a day. It would take 6 days.
Like Mars does? For the Earth to take that long would require a more distant orbit. The Earth would be a LOT colder.
I would think that it would be a Miniture Horse. It could also be a Shetland pony. Any small, affable horse would work, so long as it's good with little kids running around and grabbing it. Hope this is the type of answer you were hoping for! :)
3
it takes mercury 88 earth days to revolve around the sun
About 50 hours.