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"3) In a truiding there an 24 cylindrial pullars.\nThe radius of exch pillar is es can and height\nis \\( 4 \\mathrm { m } \\). Find the total cest of painting the\ncurved sunface anea of all pillang at the\nrate of \\( 78 \\mathrm { Penm } ^ { 2 } \\)."

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