SOLUTION: the radius of a circle is 3m. what is the circumference of another circle, whose area is 40times that of the first?
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Question 365946: the radius of a circle is 3m. what is the circumference of another circle, whose area is 40times that of the first?
Answer by robertb(5830) (Show Source): You can put this solution on YOUR website!
Let r = radius of the bigger circle. Then .
, or . Hence . Thus the circumference of the bigger circle is meters.
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