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A rectangular strip 25 cm xx 7cm is rota...

A rectangular strip `25 cm xx 7cm` is rotated about the longer side. Find the total surface area of the solid thus generated.

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Height is `25 cm`
radius is`7cm`
Volume=`22/7xx25xx7xx7`
`3850m^3`
Total surface area
`2xx22/7xxr(h+r)`
`2xx22/7xx7(25+7)`
`44xx32`
`1408m^2`
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