Let:

v_{slo} = 11.8 km/h and v_{fas} = 15.0 km/h

Time taken by the faster runner to finish the race is,

t = d/v_{fas} = 8.00/15.0 = 0.533 h

In an 8.00km race, one runner runs at a steady 11.8 km/hr and another runs at 15.0 km/hr. How far from the finish line is the slower runner when the faster runner finishes the race?