2pi*11/Sqrt[7]Integrate[x^(1/4)Sqrt[1+((11Sqrt[7])/(28x^(3/4)))^2],{x,0,28}]2pi*11/Sqrt[7]Integrate[x^(1/4)Sqrt[1+((11Sqrt[7])/(28x^(3/4)))^2],{x,0,28}]

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