If it's sports photography,

As can be seen from the photo, the width of the blurred part on the number cloth on the chest is △ L.

After the photo, the height of the person in the photo is H, and the height of Bolt is H, so the displacement within 160 seconds during the sprint is HH △ L.

According to the ratio of displacement to time, the sprint speed is 60hh △ L.

So the answer is: Hh△L, 60hh △ l.