SOLUTION: A model airplane flies a circular course at the speed of 175/sec. If it completes one circuit in 3 seconds, what the radius? can someone help me please

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Question 705341: A model airplane flies a circular course at the speed of 175/sec. If it completes one circuit in 3 seconds, what the radius? can someone help me please
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
The speed of the model plane is +175+ units/sec
This is distance around, or along the circumference.
In +1+ sec, it travels +175%2A1+=+175+ units
In +3+ sec, it travels +175%2A3+=+525+ units
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Now I can say
+C+=+525+
+C+=+2%2Api%2Ar+
+525+=+2%2Api%2Ar+
+r+=+525+%2F+%28+2%2Api+%29+
+r+=+83.556+ units