A cylindrical pillar is 50 cm in diameter and 3.5 m in height. Find the cost of paintingthe curved surface of the pillar at the rate of Rs 12.50 per `m^2`.

Explanation

To find the cost of painting the curved surface of a cylindrical pillar, we will follow these steps:

### Step 1: Find the radius of the cylindrical pillar.
The diameter of the pillar is given as 50 cm. The radius (R) is half of the diameter.

\[ R = \frac{\text{Diameter}}{2} = \frac{50 \text{ cm}}{2} = 25 \text{ cm} \]
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