Given: Total number of pillars = 24 The radius of the pillar = 28 cm = 0.28 m Height of the pillar = 4 m Formula used: The curved surface area of the cylinder =2πrh Here, r and h are the radius and height of the cylinder respectivelyCalculation: The curved surface area of the one cylindrical pillar =2πrh ⇒2×22/7×0.28×4 ⇒176/25m2 The curved surface area of the 24 pillars =(176×24)/25 ⇒4224/25m2 The cost of painting the pillar =4224/25×25=Rs4224 ∴ The cost of painting the cylindrical pillar is Rs 4224