A cylindrical pillar is 1 m in diameter and 4.2 m in height find the cost of find washing the curved surface of the pillar at the rate of rupees 15 per metre square
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CSA=2πrh
2*22/7*1/2*4.2
22*0.6
13.2m sq
cost of painting =13.2*15
rupees 198
2*22/7*1/2*4.2
22*0.6
13.2m sq
cost of painting =13.2*15
rupees 198
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