A cylindrical pillar is I m in diameter and 4.2 m in height. Find the cost of white washing the curved surface of the pillar at the rate of 15 per m.
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Step-by-step explanation:
Answer
Given radius of cylinder =
2
D
=
2
50
=25 cm=0.25 m
Height of cylinder =3.5 m
CSA of cylinder = 2πrh
=2π(0.25×3.5)
CSA of cylinder =5.5 m
2
cost of painting per meter square =12.50 RS
Total cost of painting =12.50×5.5=68.75 RS.
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