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Help me im having trouble solving this

Help me im having trouble solving this-example-1
User Hany Sakr
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1 Answer

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Explanation:


sa = 2\pi \: r {}^(2) + 2\pi \: rh \\ = 2 * 3.14 * 3 { }^(2) + 2 * 3.14 * 11

User Frodik
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