30/45=6,666 ;60 min (1 hour)x6,66= 39.96minutes
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1 hour and 30 mins
distance/speed = time (miles)/(miles per hour) = (hours)
It will take: 30/40 = 3/4 of an hour
Time = Distance/Speed = 250 miles/50 miles per hour = 5 hours
4 hours. 280/70=4