A train leaves the station traveling west at a constant rate of 45 mph. An express train leaves the same station 1 hour later he
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Answer:
Step-by-step explanation:
<u>Formula for circumference of a circle is</u>:
Circumference =
<em>Given circumference of the ring is </em>
<em>Now solving for the radius gives us:</em>
We know that area of a circle is , substituting the value of r we found, we get the area as:
area (A) =
Hence the Area (A), in terms of is