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THE STUDENTS 0F A SCHOOL PARTICIPATING IN A COMPETITION 4 MAKING AND DECORATING PENHOLDERS IN THE SHAPE OF CYLInDER WITH A BASE ,USING CARDBOARD . EACH PENHOLDER WAS 2 BE RADIUS 3cm AND HEIGHT 10.5cm. the SCHOOL WAS TO SUPPLY THE COMPETITORS WITH CARDBOARD .. IF THERE WERE 35 COMPETITORS ,HOW MUCH CARD BOARD WAS REQUIRED 4 THE COMPETITION???