Obra drove 120π meters along a circular track. If the area enclosed by the circular track on which she drove is 57,600π square meters, what percentage of the circular track did Obra drive?	Choose the correct option.
A) 6.67%	B) 12.5%	C) 18.75%	D) 25%	E) 33.3%
area enclosed by the circular track on which she drove is 57,600π square meters   So, π(r^2) = 57,600π ---&gt; (r^2)=57,600 ---&gt; r=240   Circumference of the circular track = 2πr = 480π   Therefore, part of circumference covered = 120π/480π =25%   Hence, answer is 25%.
<result>D</result>
Obra drove 120π meters along a circular track. If the area enclosed by the circular track on which she drove is 57,600π square meters, what percentage of the circular track did Obra drive?