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put this solution on YOUR website!THE 45 DEGREE RISE AND RETURN ARE EACH R~2=15~2+15~2OR R~2=450 R=21.2 METERS EACH THERFORE THE TOTAL RISE AND RETURN =42.4 METERS. THE LEVEL PART OF THE RIDE IS 1000-15-15 OR 970 METERS.
ADDING THE RISE AND RETURN OF 42.4 TO THE 970 WE GET 1012.4 METERS FOR THE LENGTH OF THE CABLE.