Find the cost of painting 15 cylindrical pillars of a building at Rs. 2.50 per square meter, if the diameter and height of each pillar are 48 cm and 7 meters respectively.
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Here we paint only the curved surface area of cylinders which is calculated using the formula 2*pi*r*h
r=radius
h=height
Curved surface area C.S.A of 1 pillar= 2*pi*24*7=1056 cm^2
Total CSA=15*1056 = 15,840 / (100*100)=1.584 m^2
Cost of painting =1.584*2.5= Rs.3.96
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