At this point, the first skier leads 20 km before the second skier and travels at a constant speed of 19 km/h. The second skier rides at 24 km/h. How long take him to catch up with the first?

Correct answer:

t =  4 h

Step-by-step explanation:

s=20 km Δv=2419=5 km/h t=Δvs t=520=4 h

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