jamalezzeddine jamalezzeddine

22-03-2014
Mathematics

contestada

the area of a circle 200 mm in diameter is approximately how many times greater than the area of circle 40 mm in diameter

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Olórin Olórin

22-03-2014

As the area of the circle is proporcional of R^2...

(200/40)^2=5^2=25 times greater

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