Average Speed

This item is taken from IGCSE Mathematics (0580) Paper 23 of October/November 2010.

To deal with this item, let us summarize the details of the problem:
   (a) Syllabus area: Algebra
   (b) Specific topic: Average Speed

   (c) Formula Needed: 

Let us identify the given in the problem:

Take note that the given time is in minutes and seconds. The problem requires us to convert it into hours. Using the conversion factors,

We can now find the average speed by dividing the total distance taken and the total time spent.

Therefore, the average speed of Priyantha is 10.8 km/h or 10 70/83 km/h. 

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