# Distance, Speed and Time Problems (F)

Want to go further, faster? In that case you had better have a good understanding of speed calculations! See if you can speed through this GCSE Maths quiz.

We all know that speed is something to do with distance and time, but can you remember how they are related? One way to remember it is to think of road speed limits. For instance, in towns the speed limit is 30 miles per hour. Speed = miles (Distance) per hour (Time). ‘Per’ means divide, so we have S = D/T. Once you have that it is a case of filling in what you know, to work out what you need.

Always remember to apply a common sense check to your answer – for instance, if you are travelling at 80km/h, it doesn’t make sense that you will cover 160km in half an hour!

Another area that catches people out is converting between m/s and km/h. It is best to work through this in stages – work up from seconds to minutes, then to an hour. Then, scale that answer from metres to kilometres. If you try to do it all in one step you are likely to trip up!

A speed of 60 units per hour is always quite nice, as this means you cover one unit every minute. Remember that next time you are on a car journey, and want to know how long until you get there!

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