Kilometers 5972

Pavlina went on a trip on a hiking trail at an average speed of 4 km/h. Dalibor followed her an hour later and hurried at a speed of 7 km/h. How many kilometers does Dalibor cover before he catches up with Pavlina?

Correct answer:

s =  9.3333 km

Step-by-step explanation:


s = 4 t
s = 7 · (t-1)

s = 4·t
s = 7 · (t-1)

s-4t = 0
s-7t = -7

Row 2 - Row 1 → Row 2
s-4t = 0
-3t = -7


t = -7/-3 = 2.33333333
s = 0+4t = 0+4 · 2.33333333 = 9.33333333

s = 28/3 ≈ 9.333333
t = 7/3 ≈ 2.333333

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