**A cylindrical pillar is 50 cm in diameter and 3.5 m in height. Find the cost of painting the curved surface of the pillar at the rate of Rs 12.50 per .**

**Solution:**

Height of the cylindrical pillar **m**

Diameter of the cylindrical pillar **cm**

Radius of the cylindrical pillar **cm** **m ** **m**

**Curved surface of the cylindrical pillar**

Cost of painting the curved surface of the pillar at the rate of Rs 12.50 per **Rs 68.75**