circle p has a radius of 7 and circle r has a diameter of 8. the circumference of circle p is how much greater than the circumference of circle r?

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10-11-2016
Mathematics

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circle p has a radius of 7 and circle r has a diameter of 8. the circumference of circle p is how much greater than the circumference of circle r?

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0Tom 0Tom · Answer 1 · 2016-11-12T23:56:25+01:00

0Tom 0Tom

12-11-2016

Circumference of a circle =2πr (π≈3.14, r= radius)
Diameter of a circle =2r (r=radius)

circle p's circumference =2π(7)=14π
circle r's circumference=2π(8/2)=8π

14π/8π=7/4
Circle p's circumference is 1.75 times greater than circle r's circumference.

or

14π-8π=6π
Circle p's circumference is around 18.9 units longer than circle r's circumference

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