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                                    Look at the diagram showing the speeds at which the cyclist coof 2000 m over a flat and hillythe speed the highest when heare known?the differentst covers a routehilly road. Why isen he is cyclingdownhill?48 km/h12 km/hAlilude, m28 km/h28 km5001000Distance, m1500 | 
                            
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Answer»  what is this I don't UNDERSTAND  | 
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