Traveling 4836

A passenger car traveling at a speed of 60 km/h arrived from place A to place B one and a half hours earlier than a truck traveling at 40 km/h. How far apart are placed A and B, and how long did the car travel?

Correct answer:

s =  180 km
t =  3 h

Step-by-step explanation:


s = 60t
s = 40(t+1.5)

s = 60·t
s = 40·(t+1.5)

s-60t = 0
s-40t = 60

Row 2 - Row 1 → Row 2
s-60t = 0
20t = 60


t = 60/20 = 3
s = 0+60t = 0+60 · 3 = 180

s = 180
t = 3

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