ST1.8 Thinking laterally

Graphic - No title - runnerbird
An athlete runs at a speed of 15 kmhr-1. When he is 7.5 km from the finish a bird sets out at 30 kmhr-1. When the bird reaches the finish it turns and flies back to the runner, turns again, and continues back and forth until the athlete reaches the finish. What is the total distance the bird travels?
Incorrect
Incorrect
Incorrect
Correct
Incorrect

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