Q : 5 A cylindrical pillar is in diameter and in height. Find the cost of painting the curved surface of the pillar at the rate of per .
Radius of the cylindrical pillar, r =
Height of the cylinder, h =
Curved surface area of a cylinder =
Curved surface area of the pillar =
Cost of painting of the pillar =
Cost of painting the curved surface area of the pillar =
Therefore, the cost of painting curved surface area of the pillar is