It costs Rs. 2200 to paint the inner cur...

It costs Rs. 2200 to paint the inner curved surface of a cylindrical vessel 10m dep. If the cost of painting is at the rate of Rs. 20 per `m^2,` find: radius of the base Capacity of the vessel?

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Curved surface area of cylinder`=2pirh`
`=2*22/7*r*10`
Cost of painting of 1 `m^2`=Rs20
`2*22/7*r*10=20*2*22/7*10pir`
`r=7/4m`.

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