SOLUTION: i am not a student but a horse rider and i want to know if i have an 80ft. diameter round pen how many times would the horse need to go around the round circle to equal a mile. tha

Question 932063: i am not a student but a horse rider and i want to know if i have an 80ft. diameter round pen how many times would the horse need to go around the round circle to equal a mile. thankyou mary jane

Answer by josgarithmetic(39613) (Show Source): You can put this solution on YOUR website!
1 mile = 5280 feet
Circumference of a circle, using d for diameter

The horse would not be moving ON the circle, but a little to the inside or interior, so you may need to know exactly how far from the circle's boundary the horse travels.

, how many circumferences in 1 mile.
x is for how far away from the circumference inside the circle's interior.

Those can be simplified. is the formula for circumference if using the diameter, d. Your answer in purely symbolic form then is
for how many of the track's circumferences are in 1 mile of distance.
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