Question

Let A=total area of five circles of radius r, and let B= total area of three circles of radius s. If A=B, then r/s=

Answer 1

Total area of five circles of radius r is 5pi r^2
Total area of three circles of radius s is 3pi s^2

If A = B, then 5pi r^2 = 3pi s^2
r^2 / s^2 = 3/5

Therefore r/s = sqrt(3) / sqrt(5)