Hi,
Answer: 9.9 hours so approximately 10 hours
My work: Jupiter as the fastest rotation of all the planets in the solar system with a time spans of 9.9 hours which rounded is 10 hours.
Extra Information: Jupiter takes 11.86 years to go around the sun it’s rotation of the axis is 3.13.
Words you might not know:
1) Rotation - An object moving on its axis.
2) Approximately - Rounded or almost.
I Hope I Helped!
~KingJupiter