Moving

Vojta left the house at three o'clock at 4 km/h. After half an hour later went from the same place Filip by bicycle at speed 18 km/h.

How long take Tilip to catch up with Vojta, and how far from the house?

Correct answer:

t =  11.5 min
s =  3.5 km

Step-by-step explanation:

v1=5km/h v2=18km/h  s1=s2=s v1(t+30)=v2t 5t+305=18t  t=11.5 min
s=s1=v1(t+30 min)=3.5 km



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