Question

Из двух пунктов, расстояние между которыми равно 84км, в одном и том же направлении одновременно выехали два автомобиля со скоростями 68,4 км/ч и 57,9 км/ч. Автомобиль с меньшей скоростью двигался впереди. Через сколько часов один автомобиль догонит второй?

Answer 1

1) 68,4+57,9=126,3   2) 126,3:84=сам реши и узнаешь

Answer 2

Problem Analysis

We have two cars traveling in the same direction, with one car traveling at a speed of 68.4 km/h and the other car traveling at a speed of 57.9 km/h. We need to determine how many hours it will take for the faster car to catch up to the slower car.

Solution

To solve this problem, we can use the formula:

Time = Distance / Relative Speed

The relative speed is the difference in speeds between the two cars. In this case, the relative speed is 68.4 km/h - 57.9 km/h = 10.5 km/h.

The distance between the two cars is given as 84 km.

Substituting the values into the formula, we get:

Time = 84 km / 10.5 km/h

Calculating this, we find:

Time = 8 hours

Therefore, it will take 8 hours for the faster car to catch up to the slower car.

Answer

The faster car will catch up to the slower car in 8 hours.