There are 1000 metres in a kilometre, so 5100 metres in 5.1 km.
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The prefix kilo (k) means one thousand, there are 1 000 metres in1 kilometre. To convert kilometres to metres you multiply by 1 000.
So 51 kilometres is 54 000 metres.
1 km = 1,000 meters 2 km = 2,000 meters . . 10 km = 10,000 meters . . 20 km = 20,000 meters
5 km = 5000 meters
1.61 km=1610 meters
123 meters = 0.123 km
Answer: 0.05 km = 50 meters.