## calculusxy one year ago Geometry question again.. MEDAL!

1. calculusxy

|dw:1444597385880:dw| In the figure above, two circles have radii of a and b, respectively. If a = 1/3b, and the sum of the circumferences of the two circles if $$64\pi$$, then what is the value of b?

2. calculusxy

I got 24

3. Loser66

yup

4. calculusxy

$\huge \tt THANKS!$