Question

cylindrical pillar is 50 centimetres in diameter and 3.5 metre in height find the cost of painting the curved surface area of the pillar at the rate of 200 per square metre
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Answer 1

Answer:

Given radius of cylinder =

Given radius of cylinder = D/2= 50/2 =25 cm=0.25 m

Height of cylinder =3.5 m

$CSA \: of \: cylinder \: = \\  2πrh</strong></p><p></p><p><strong>[tex]CSA \: of \: cylinder \: = \\  2πrh=2π(0.25×3.5) \\ </strong></p><p></p><p></p><p></p><p><strong>[tex]CSA \: of \: cylinder \: = \\  2πrh=2π(0.25×3.5)$

CSA of cylinder =5.5 m²

cost of painting per meter square =200 RS

Total cost of painting =200×5.5= RS. 1100