a circular path of 16 m radius has marginal walk 3 m wide all round it . find the cost of leveling the walk at rs . 2 per m 2 ?
explanation : π ( 19 ^ 2 - 16 ^ 2 ) = 22 / 7 * ( 361 - 256 ) = 330 330 * 2 = rs . 660 answer : option a
multiply(2, subtract(circle_area(add(16, 3)), circle_area(16)))