Dividing distance travelled in kilometres by time taken in hours gives 3 / 3/12 = 12 kilometres per hour.
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The average speed of boat in kilometers is per hour is 20 km /hr.
4 kilometers
I got 4 kilometers because i converted minutes into hours which then have to do it again with 16 kmhr.
15 kilometers per hour
A horse that runs 15km in 30 minutes will run 30km in one hour (60 minutes).