70/2.5 = 28 km/hour
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30 minutes
3 hours and 30 minutes = 7/2 in improper fraction1 hour = 60 minutes30 minutes = 30 minutes * 1 hour/60 minutes =30/60 = 1/2 hour3 hours and 30 minutes:= 3 hours + 1/2 hour= 3 1/2 hours= [(2 * 3)+1]/2= [6+1]/2= 7/2
2 hours 30 minutes
7 hours and 30 minutes is 7.5 hours.
3 Hours and 30 Minutes=210 minutes=12600 seconds