the car travels 2.5 hours.what is the average velocity of the car during that part of the trip
+226 To answer a question on distance, speed or time you need two of these to answer the third.
In this case you have given the time and are asking for the speed, so you will also need to give the distance travelled to enable this.
The formula you require for this is speed = distance/time.
The formula for distance , speed and time calculations is $${\frac{{\mathtt{D}}}{\left({\mathtt{S}}{\mathtt{\,\times\,}}{\mathtt{T}}\right)}}$$ where D=Distance, S=Speed and T=Time. Whichever answer you require, cover it and the remaining is the formula for that answer. So if i wanted to know the distance, you would cover the "D", leaving the formula "S" multiplied by "T". If you wanted to know the speed as in your question, you would cover the "S", leaving "D" divided by "T".
I find it helps me to remember this by the fact that the letters appear in the order they appear in the word "DiSTance", the three letters don't all appear in either "Speed" or "Time".
It is important to ensure that you are using the same units of measure for the distance and speed e.g. Miles for distance and MPH (miles per hour) for speed, or Kilometres for distance and km/h (Kilometres per hour) for speed. It doesn't matter what unit of measure you use, as long as you use it across the whole calculation. If you use any non metric unit of measure you must convert any fraction of a whole unit into a decimal.
You also need to ensure that the time applied to the calculation is expressed in decimal hours e.g. 15 minutes = 0.25 hours, 1 hour 45 minutes = 1.75 hours .etc. Your question gives the time to a to a decimal already. You may then need to convert this back to the conventional hours and minutes if required for your answer?
+226 To answer a question on distance, speed or time you need two of these to answer the third.
In this case you have given the time and are asking for the speed, so you will also need to give the distance travelled to enable this.
The formula you require for this is speed = distance/time.
The formula for distance , speed and time calculations is $${\frac{{\mathtt{D}}}{\left({\mathtt{S}}{\mathtt{\,\times\,}}{\mathtt{T}}\right)}}$$ where D=Distance, S=Speed and T=Time. Whichever answer you require, cover it and the remaining is the formula for that answer. So if i wanted to know the distance, you would cover the "D", leaving the formula "S" multiplied by "T". If you wanted to know the speed as in your question, you would cover the "S", leaving "D" divided by "T".
I find it helps me to remember this by the fact that the letters appear in the order they appear in the word "DiSTance", the three letters don't all appear in either "Speed" or "Time".
It is important to ensure that you are using the same units of measure for the distance and speed e.g. Miles for distance and MPH (miles per hour) for speed, or Kilometres for distance and km/h (Kilometres per hour) for speed. It doesn't matter what unit of measure you use, as long as you use it across the whole calculation. If you use any non metric unit of measure you must convert any fraction of a whole unit into a decimal.
You also need to ensure that the time applied to the calculation is expressed in decimal hours e.g. 15 minutes = 0.25 hours, 1 hour 45 minutes = 1.75 hours .etc. Your question gives the time to a to a decimal already. You may then need to convert this back to the conventional hours and minutes if required for your answer?
