A truck drove out of the city at a speed of 60 km / h. Simultaneously with her, a passenger car drove out of the city

| August 7, 2021 | education

A truck drove out of the city at a speed of 60 km / h. Simultaneously with her, a passenger car drove out of the city along the same highway. After 2 hours, she overtook the truck by 40 km. At what speed was the car traveling?

In order to find the speed of a passenger car, we first need to find which path the truck traveled in 2 hours. To do this, we will use the formula:

S = V * t

From the condition of the problem, we know that the speed is Vgr = 60 km / h, and the time is t = 2 h. Then the truck traveled the path:

Sgr = Vgr * t = 60 * 2 = 120 km.

We know that in two hours a passenger car overtook a truck by 40 kilometers. Then the path that the passenger car covered in 2 hours is:

Sleg = Sgr + 40 = 120 + 40 = 160 km

Now we can find the speed of a passenger car by expressing it from the first formula:

Vleg = Sleg / t = 160/2 = 80 km / h



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