We know that r1>r2.

Statement 1: $$2\pi(r1-r2) $$ = k. We cannot determine r1 from this information

Statement 2: $$\pi(r1^2-r2^2)$$ = m. We cannot determine r1 from this information.

Using both statements together, (r1+r2)/2 = m/k. We now have two linear equations with two variables. Hence, we can determine the value of r1 in terms of m and k.

Hence, the answer can be found using both statements together.