Cheetah vs antelope

When the cheetah began chasing the antelope, the distance between them was 120 meters. Although the antelope was running at 72km/h, the cheetah caught up with it in 12 seconds. What speed was the cheetah running?

Correct result:

v =  108 km/h

Solution:

s1=s2  t=12 s h=12/3600  h=0.00333 h s0=120 m km=120/1000  km=0.12 km    72 t+s0=v t 72 0.0033333333333333+0.12=v 0.0033333333333333  0.003333v=0.36  v=108=108 km/h



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