Comparing stride lengths to find who won the race

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viren_t2005
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Jack, Dough and Ann, 3 children had a race when returnung from school. Ann takes 28 steps when dough takes 34 steps , meantime Jack takes 21 steps. Jack explained that his 6 steps equals dough's 7 steps and Ann's 8 steps . Who won the race?
 

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Give 1 unit as Jack's 6 steps. then you will get the distances as 3.5, 4 and 4.25 for Jack, Ann and Dough.
 
Not enough information, or the question is ambiguous. No matter how long their stride might be, they could all arrive at the same time. There are no time units.