During that 300 m he covers at a speed of 46 ms how fast


John runs a 20 k race against Sam. John averages 4.5ms for the first half of the race, then runs at a speed of 4.2 m/s until the last 300 m. During that 300 m, he covers at a speed of 4.6 m/s. How fast would Sam have to run to be John?

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Mathematics: During that 300 m he covers at a speed of 46 ms how fast
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