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Either calculate the distance travelled (in miles) and divide by the total time (in hours) taken to undertake the journey or calculate in other units and carry out a conversion.

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Q: How do you work out average speed in miles per hour?
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How long does it take to travel 90 miles by car?

That depends on how fast the car is going. So if the car is going at 90 miles per hour, then guess what, it's going to take an hour to travel 90 miles. If the car is going half as fast then it takes twice as long. So at half the speed of 90 miles per hour (45 miles per hour) it's going to take two hours. But what if the car isn't going at a constant speed, as most cars don't. Then you need to work out (or take a guess at) the average speed. The average speed for mostly freeway driving and a little bit of surface streets is most likely about 50 or 55 miles per hour, and for city driving could be about 15-25 miles per hour. Since you are driving 90 miles, I am going to assume that you are not going to be doing city driving the whole way, and you are going to do a bit of freeway driving, so I will guess your average speed is going to be about 50 miles per hour. At 50 miles per hour the journey takes 90 miles divided by 50 miles per hour, that is 1 4/5 hours. Four fifths (4/5) of an hour is 48 minutes, which gives a travel time of 1 hour 48 minutes at 50 miles per hour. So that's because the question is in the math and algebra section. If you actually are travelling by car 90 miles, and you know where the start and end point are, the best way of getting a good estimate of your travel time is using Google Maps. Choose 'Get Directions', fill in the start and the end address and choose 'by car'. Look at the directions that are returned, and lo and behold, an estimate of the travel time. Good luck travelling 90 miles in your car!!


How many minutes is in 9 miles?

None. Minutes is a unit of time. Miles is a unit of measurement. The only way you get miles per hour is by knowing the speed of travel. This question needs work to get an answer.


The nile river is 4160 miles long but if you travel at a speed of 20 miles per hour how long would it take you?

Time = Distance / Speed So it would take you 4160 / 20 hours. You can work that out for yourself.


130 Horsepower is how many Miles Per Hour?

Horsepower is a unit of power that measures how much work an engine can do. It is not directly convertible to miles per hour, which is a unit of speed. The relationship between horsepower and miles per hour depends on various factors such as the weight of the vehicle, the efficiency of the engine, and the gearing ratio. In general, a vehicle with 130 horsepower can reach different speeds depending on these factors.


How do you work out the average speed?

That depends on that data you have.If you have a start and finish time, and the overall distance then you divide the distance in miles (or other units) by the number of hours and you'll get miles per hour.If I leave home at 07:15 and get to work at 9:00, having travelled 6.5 miles then I have an average speed of 6.5 / 1.75 = 3.71 mph. (but that's enough about the Dublin bus service!)If you have two or more different speeds, and the length of time each was travelled then you wan work out the overall distance and the overall time, and proceed as above.