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Time = Distance/Speed = 30 miles / 40 mph = 30/40 hours = 0.75 hours or 45 minutes.
30 min.
dolphins cannot run, they swim.but, they swim between 30 and 40 miles per hour
No, not yet! The fastest humans have not yet reached 30 miles per hour.
You want to travel 30/45 of the distance per hour, or 2/3. So, if you travel 45 miles in 60 minutes, then you travel 30 miles in x minutes. 45/60, or 3/4 =30/x. 30/3=10, so you multiply 4*10=40=x. It would take 40 minutes to travel 30 miles at 45 miles an hour.