Answer:
400 meters or 0.40 km
Explanation:
All you have to do is subtract the before from the after so 2.79-2.39=0.4
Then you convert the km in meters which is 400 .
1 km is 1000 meters so 0.4 x 1000=400
0.40 km
2.79-2.39=0.40
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