A circular path of 19 m radius has marginal walk 2 m wide all round it. Find the cost of leveling the walk at 25p per m2?  Choose the correct choice:
A) rs.49.25  B) rs.40.50  C) rs.44.20  D) rs.62.85  E) rs.43.10
Explanation:   π (21^2 - 19^2) = 22/7 * (441-361) = 251.43   251.43 * 1/4 = Rs.62.85   Answer: Option rs.62.85
<result>D</result>
A circular path of 19 m radius has marginal walk 2 m wide all round it. Find the cost of leveling the walk at 25p per m2?