SOLUTION: A running track has the shape with straight sides and semicircular ends. if the length of the track is 440 yd the two straight parts are each 110 yd long, what is the radius of the

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Question 355624: A running track has the shape with straight sides and semicircular ends. if the length of the track is 440 yd the two straight parts are each 110 yd long, what is the radius of the semicircular parts(to the nearest yd)?
Answer by robertb(5830) About Me  (Show Source):
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the two straight parts are each 110 yards. Thus each of the two congruent semicircular parts must also be 110 yards each. Now circumference C+=+2%2Api%2Ar, or C%2F2+=+pi%2Ar. This means that 110+=+pi%2Ar, or r+=+110%2Fpi. To the nearest yard, this is equal to 35 yards.