Hence ,From the Guide there are other parameters which with this equation will give the exact time the athlete's walk back

From the question we are told 
If the average velocity during the athlete's walk back  to the starting line in Guided Example 2.5 is – 1.50 m/s, 
Generally the equation Time spent  is mathematically given as
T=\frac{d}{v}
Therefore

Hence ,From the Guide there are other parameters which with this equation will give the exact time the athlete's walk back

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