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.