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"The diameter of a roller is 84\\( \\mathrm { cm } \\) and its length is 120\\( \\mathrm { cm } .1 \\mathrm { t } \\) takes 500 complete\nrevolutions to move over once to level a playground. Find the area of the playground\nin \\( \\mathrm { m } ^ { 2 } ? \\left[ \\pi = \\frac { 22 } { 7 } \\right] \\)"

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