19.3548 mph
Dividing the distance in miles, 125, by the time in hours, 6.25, gives us 125 / 6.25 = 20 miles per hour.
This question is incomplete. You need to know the rate of travel as well as well as the distance traveled in order to find time needed to cover 959 miles.
330 kilometers / 4.25 hours = 77.65 kilometers per hour
You would have to average 3 miles per hour, but you could do that a lot of ways, such as by walking four miles per hour for two hours and then two miles an hour for two hours.
37.5 mph
To get the average speed, divide distance by time.
This is a trick question and the only possible answer is "it can't be done". In order to average 40MPH over 20 miles, the entire trip has to last 30 minutes (MPH=miles/hours). At the halfway point, which is 10 miles, at 20MPH it already took 30 minutes to get there, so there is no way to "make up for lost time" - no matter how fast you go, you can't average 40MPH on the trip. Even if you somehow were magically able to travel at the speed of light for the remaining 10 miles, which is 670,616,629MPH, your average speed of the trip would be only 39.999999881MPH, not quite 40MPH.
The answer is 75 mph. If one travels at 45 mph for one mile, then in order to travel an average of 60 mph for the 2 miles, the rate must be 75 mph (60-45=15). Then add 15 to 60 to get the rate for the second mile. To check the answer add 75 and 45 and divide by 60 (the minutes in one hour) to get the distance (2 miles).
In order to work this problem, you must know how fast you will be driving. Let's assume you will be driving an average of 55 miles per hour (that is, 55 mph). This means in one hour you will drive 55 miles. (1 hour/55 miles) x (212 miles) = 3.85 hours If you will be driving faster or slower than 55 mph,then change the 55 in the problem above and redo the multiplication to see what your time will be.
Your average speed must be exactly 235 km per 3.25 hours.In more familiar units:235/3.25 = 72.3077 km per hour (rounded)
15
At 80 km/hr - which I am assuming is what you meant by 80 km, a car will travel 120 km. To make that journey in 2 hours, it must travel at 120 km/2 hr or 60 km/hr.