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

Use the relationship between tangential speed and circular motion: v = 2πr/T, so r = vT/(2π). Convert the rotation time to seconds: 9.9259 × 3,600 = 35,733.24 s. Then r = (12,293 m/s × 35,733.24 s)/(2π) ≈ 69,912,000 m, or about 69,912 km. The answer is D, 69,912 km.

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