1. The problem statement, all variables and given/known data http://img94.imageshack.us/img94/9216/thethingy.jpg [Broken] Through a circle roundabout whose radius is 220 meters, they constructed a sidewalk in width of 30 meters. Calculate the perimeter of the sidewalk. 3. The attempt at a solution perimeter of a circle equation: 2 x pi x R So 220+30 = 250 2 x pi x 250 = 1570.8 squared meters. And yet I'm told the answer is 880 meters.