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The distance between a and B is s kilometers. It takes t hours for someone to go from a to B. now he is required to arrive 15 minutes in advance. The walking speed of this person is____ I calculated the result as S / (t-0.25), why did the teacher say it was wrong?
A: maybe 4S / 4t-1
The distance between a and B is s kilometers. It takes t hours for someone to walk from a to B. now he is required to arrive 15 minutes in advance. How many kilometers per hour is the walking speed of this person?
s/(t-15/60)
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