A cylindrical pillar is 50cm in diameter and 3.5m in height. find the cost of painting the curved surface area of the pillars the rate of rs 12.50 per m².
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dimension of pillar;
d=50cm or .5m,r=.25m
h=3.5m
CSA of cylinder=2πrh
=2*22/7*.25*3.5
=5.5m²
cost of painting=5.5*12.50
=rs 68.75
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