If Jupiter takes 9.9259 hours to rotate on its axis and has a tangential speed of 12,293 m/s what is its radius?

When a body is moving in circular path at a distance r from its center its velocity at any instant will be directed tangentially. This is what we call tangential velocity or speed. It can be calculated as follows:

Tangential velocity = 2πr / t

12293 = 2πr / 9.9259 (3600)

r = 69911788.03 m

Hope this answers the question. Have a nice day.