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 m2. (Assume π = 22/7)

Given

Diameter of cylindrical pillar=50 cm

Height of cylindrical pillar (h)=3.5 m

Find out

We have to find the cost of painting the curved surface of the pillar at the rate of Rs. 12.50 per m²

Solution:

The radius (r)=d/2=50/2=25cm=0.25 m

Curved surface area of cylindrical pillar=2πrh

=2*(22/7)*0.25*3.5

 =5.50 m²

Rate of painting=₹12.50 per m²

Hence, cost of painting the curved surface of the pillar=5.50*12.50=₹68.75

Answer

The cost of painting the curved surface of the pillar at the rate of Rs. 12.50 per m² is Rs 68.75.