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[" 6.A metallic pipe is "0.7cm" thick.In...

[" 6.A metallic pipe is "0.7cm" thick.Inner radius of the pipe is "3.5cm" and length is "],[5dm" .Find its total surface area."],[" (i)int: Total wiflace area insiet surface area + Outer surface ares t Area of two rims) "]

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