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?

Result

v =  108 km/h

Solution:

s1=s2  t=12 s=12/3600 h=0.00333333333333 h s0=120 m=120/1000 km=0.12 km   72 t+s0=v t  72 0.00333333333333+0.12=v 0.00333333333333  0.003333v=0.36  v=108 =108  km/h s_{ 1 } = s_{ 2 } \ \\ \ \\ t = 12 \ s = 12 / 3600 \ h = 0.00333333333333 \ h \ \\ s_{ 0 } = 120 \ m = 120 / 1000 \ km = 0.12 \ km \ \\ \ \\ \ \\ 72 \cdot \ t+s_{ 0 } = v \cdot \ t \ \\ \ \\ 72 \cdot \ 0.00333333333333+0.12 = v \cdot \ 0.00333333333333 \ \\ \ \\ 0.003333v = 0.36 \ \\ \ \\ v = 108 \ \\ = 108 \ \text { km/h }



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