Since 1 kilometer is equal to 1000 meters, then 3 kilometers is 3 x 1000 = <<3*1000=3000>>3000 meters.
Since an hour has 60 minutes, then 2 hours is equal to 2 x 60 = <<2*60=120>>120 minutes.
Therefore, her speed is 3000 meters/120 hours = <<3000/120=25>>25 meters per minute.
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