Question 1027686
Find the area of the total target.
{{{A=pi*R^2=pi(24)^2=576pi}}}
So each of the rings has an area of,
{{{A[r]=(576pi)/4}}}
{{{A[r]=144pi}}}
So the inner ring's radius would be,
{{{pi*R[i]^2=144pi}}}
{{{R[i]=12}}}{{{cm}}}