Answer :

Dlesar
It's easier to write if you convert 1/4 into 0.25.

[tex] \frac{0.25mi}{1.6min} = \frac{1mi}{xmin} [/tex]

Then you use algebra to find that he ran the mile in 6.4 minutes.
There are four 1/4 miles in a mile. 
4*1.6 = 6.4

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