If you drive at 167km/hr then you will be at your destination in 1 hour. If you drive at 80km/hr then it 167 / 80 = 2.0875 hours. Note that the speed above must be your average. So if you go a constant 80 in the city and 160 on the highway your average is 120. At that speed you will be there in 167 / 120 = 1.39 hours.
It is: 120/5 = 24 mph
speed = distance over time speed = 120/2 = 60 km/hr
Travelling at 60 kilometres per hour over 120 hours, and assuming no rest breaks, gives a total distance of 120 x 60 = 7200 kilometres.
Time = Distance/Speed So time = 1550km/120 kmh = 12.9166... hours. This is based on the unrealistic assumption that you can maintain an average speed of 120 kmh for nearly 13 hours - a length of time which will require some fuelling stops, and ideally some comfort stops as well!
Time = Distance/Speed = 120/50 = 2.4 hours
8 hours
8 hours
40 mph
420
Time = Distance/Speed = 120/56 hours = 120*60/56 minutes = 110.8 minutes, approx.
The average speed is 120 miles per hour.