Question

Acylindrical pillar is 50 cm in diameter and 3.5 metre in height.Find the cost of painting the curved surfaceof the pillar at the rate of ₹12.50metre per square​

Answer 1

Radius = 50/2 = 25cm = 0.25m

Height = 3.5m

CSA = 2π r h

= 2 ×22/ 7 ×0.25 × 3.5 = 5.5 m²

cost of painting the curved surface of the pillar

= 5.5× 12.50 = Rs 68.75

Hope it will help you .