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How long to drive 400 miles at 70 mph?

To calculate the driving time, we can use the formula:

Time = Distance / Speed

Given:

Distance = 400 miles

Speed = 70 mph

Time = 400 miles / 70 mph

Time ≈ 5.71 hours

So, it will take approximately 5 hours and 43 minutes to drive 400 miles at a speed of 70 mph.