Athletic oval

On the 400 m athletic oval, two athletes started back to back from the same level. After the starting shot, they both ran away from each other at the same time. Athlete A ran at 15 km/h, and Athlete B ran at 17 km/h. A) in how many seconds did the athletes meet each other? B) how many meters did each athlete run before they met?

Correct result:

t =  45 s
s1 =  187.5 m
s2 =  212.5 m

Solution:

s=400 m v1=15 km/h m/s=15/3.6  m/s=4.16667 m/s v2=17 km/h m/s=17/3.6  m/s=4.72222 m/s  t=sv1+v2=4004.1667+4.7222=45 s
s1=v1 t=4.1667 45=3752=3752 m=187.5 m
s2=v2 t=4.7222 45=4252=4252 m=212.5 m



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