Moving

Walter left the house at three o'clock at 4 km/h and, half an hour later, went from the same place to Philip by bicycle at speed 11 km/h.

How long does it take Philip to catch up with Walter, and how far from the house?

Final Answer:

t =  25 min
s =  4.6 km

Step-by-step explanation:

v1=5 km/h v2=11 km/h t2=1/2=21=0.5 h  s1 = s2 = s  v1(T+t2)=v2 T 5(T+0.5)=11 T  5 (T+0.5)=11 T  6T=2.5  T=62.5=0.41666667  T=1250.416667  t=T min=T 60  min=0.4167 60  min=25 min=25 min
s=v2 T=11 0.4167=4.6 km



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