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 lo
ng as the other.
smaller circle- r
larger circle- 2r
what is the radius of the larger circle?
2 answers:
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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