SOLUTION: The circumference of a circle is 480 in. What is its radius? What is its diameter?

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Question 69384: The circumference of a circle is 480 in. What is its radius? What is its diameter?
Found 2 solutions by stanbon, funmath:
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
The circumference of a circle is 480 in. What is its radius? What is its diameter?
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2(pi)r=480
pi r = 240 in
radius =240/pi
radius =76.39... in
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diameter = 2r= 480/pi
diameter = 152.7887... in
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Cheers,
Stan H.

Answer by funmath(2933) About Me  (Show Source):
You can put this solution on YOUR website!
The circumference of a circle is 480 in. What is its radius? What is its diameter?
There are 2 formulas for the circumference of a circle: highlight%28C=2%2Api%2Ar%29, where C=circumference and r=radius and highlight%28C=pi%2Ad%29, where C=circumference and d=diameter, pi can be left as pi or interpretted as 3.14 depending on your teachere's request.
480in=2%2Api%2Ar
480in%2F%282%2Api%29=2%2Api%2Ar%2F%282%2Api%29
highlight%28240in%2Fpi=r%29 Exact answer.
highlight%2876.39in=r%29 Approximate answer rounded to the hundredths spot.
:
480in=pi%2Ad
480in%2Fpi=pi%2Ad%2Fpi
highlight%28480in%2Fpi=d%29 Exact answer.
highlight%28152.79in=d%29 approximate answer rounded to the nearest hundredth.
Notice that d=2r and r=(1/2)d and our answers reflect that relationship.
Happy Calculating!!!