Question: A runner is planning for a 10km race. She can maintain a steady speed of 3.9m/s for as much time as needed before ending the

A runner is planning for a 10km race. She can maintain a steady speed of 3.9m/s for as much time as needed before ending the race with a 7.9m/s sprint.

If she wants to finish in 40mins or less, how far from the finish should she begin to sprint?

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