As in question, the speed of person is given m/s whereas the distance he needs to cover is given in miles.
Formula to calculate the time,
[tex]Distance = velocity \times time[/tex]
To get the correct answer, convert the distance in to miles.
[tex]1 mile = (1\times1.6093)\times1,000=1,609.3[/tex]
Therefore,
[tex]1,609.3 meters = 1.90 m/s \times time[/tex]
or
[tex]time = \frac{1,609.3 m}{1.90 m/s}[/tex]
[tex]time = 847 s[/tex]
