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On the Road

Four vehicles travelled on a road. What can you deduce from the times that they met?

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There and Back

Brian swims at twice the speed that a river is flowing, downstream from one moored boat to another and back again, taking 12 minutes altogether. How long would it have taken him in still water?

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Escalator

At Holborn underground station there is a very long escalator. Two people are in a hurry and so climb the escalator as it is moving upwards, thus adding their speed to that of the moving steps. ... How many steps are there on the escalator?

An Average Average Speed

Stage: 4 Challenge Level: Challenge Level:1

  • Does it matter how far Cardiff is from Cambridge ?

  • Will the overall average speed change if it was twice as far ? Half as far ? 100 miles ? One mile ?


Here's another thought : 60 miles per hour (mph) is how many hours per mile (hpm) ?