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2015-06-16T14:59:42+05:30

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Length of green ribbon = 1200 + 50 = 1250 cm
Length of red ribbon = 3/5 (length of green ribbon)
                              = 3/5 × 1250
                              = 750 cm
Length of yellow ribbon = [2 +1/2] × (length of red ribbon)
                                  = [5/2] × (750)
                                  = 1875 cm
                                  = 18.75 m
2 5 2