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Anonymous
1 kilometre = 1000 metres so 45 km - 45*1000m = 45000 m. Simple!
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1,000 m = 1 km 2,000 m = 2 km 3,000 m = 3 km . . . 9,000 m = 9 km
1000 m = 1 km so 3100 m = 3.1 km.
7.2 km
8 km
1000 m = 1 km so 49000 m = 49000/1000 = 49 km. Simple!