The following speed-time graph shows the speeds of a cyclist on a journey lasting two hours.
Notice that:
- after 10 minutes the cyclist is riding at 30 km/h.
- the cyclist is only stationary when the speed is 0 km/h.
Example
At how many minutes was the cyclist travelling at 45 km/h?
Answer
70 minutes
If we look at the mark by 45 km/h and follow it down to the x-axis, we can see that it is 70 minutes.
Let's have a go at some questions now.
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