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Anonymous
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30 km/hour = 18.6 MPH.
One hour is 60 minutes so 30 minutes is one-half of an hour.
1 Hour and 30 MinutesIt is 1 hour 30 mins
It is half an hour because 30/60 = 1/2
30 minutes is 1/2 of an hour (50%) or 0.5 hours.