A circular path of 12 m radius has marginal walk 2 m wide all round it. Find the cost of leveling the walk at 50p per m2?  Pick.
A) Rs.49
B) Rs.40
C) Rs.81.72
D) Rs.42
E) Rs.43
Explanation:   π (14^2 - 12^2) = 22/7 * 52 = 163.43   163.43 * 1/2 = Rs.81.72   Answer: Option Rs.81.72
<result>C</result>
A circular path of 12 m radius has marginal walk 2 m wide all round it. Find the cost of leveling the walk at 50p per m2?