Speed, Distance, Time

MathematicsAQAEdexcelGCSEUnit: Ratio & Proportion
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The basics

The Formula That Moves the World

The Formula That Moves the World

Every journey you've ever taken - walking to school, driving on holiday, flying abroad - can be described by just three numbers: how fast, how far, and how long. The relationship between speed, distance, and time is so simple it fits in a triangle, but so powerful it helps pilots, engineers, and even athletes!
Speed Distance Time formula triangle showing DST method, three formulas (S=D÷T, D=S×T, T=D÷S), units matching, and worked examples
What is average speed?: Average Speed = Total Distance ÷ Total Time Not the mean of individual speeds — you must use the overall distance and overall time.
Key terms

Mathematics glossary

What is average speed?
Average Speed = Total Distance ÷ Total Time Not the mean of individual speeds — you must use the overall distance and overall time.

Now try it yourself

Quiz · Question 1 of 14

Which formula correctly shows the relationship between speed (S), distance (D), and time (T)?

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