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ashnavarro1230
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the sum of the area of 2 circles is 80pi square meters. Find the length of a radius of each circle if one of them is twice as long as the other.

smaller circle- r

larger circle- 2r

what is the radius of the larger circle?

Verified Answer :

charlottekrist

80p=pr^2+p(2r)^2
80p=pr^2+4pr^2
80=r^2+4r^2
80=5r^2
16=r^2
r=4 for the smaller circle´s radius, and 8 is the larger circle´s radius.

Have a nice day, I hope this was helpful :D

Answer:

8 is the correct answer


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