**Concept: The question tests on Rates(Time-Speed)**

**Solution:**

Distance covered by a circular figure = n * Circumference, where n is the number of revolutions and circumference = 2πr

Distance = 20 * 2 * π * 18 = 720π

12 inches = 1 foot

720π inches = 720π / 12 = 60π Feet**Option A**