Mathematics
Pink Kangaroo
2023
4

4

Mary had to run to catch the train, got off two stops later and then walked to school. Which of the following speed-time graphs would best represent her journey?

Answer

E

SOLUTIOn

The order of speeds needs to be train > running > walk. This rules out A and B. The train section of the trip needs to have just a single intermediate stop in the middle of the trip. However C shows no intermediate stop, just a slowing, and D shows two intermediate stops. This leaves E as the only feasible solution.

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