Question

Из одного города в противоположных направлениях одновременно выехали два автомобиля. Скорость одного из них 74км/ч, что на 8 км/ч больше, чем скорость другого. Какое расстояние будет между ними через 7ч после начала движения?

Answer 1

74 - 8 = 66 ( км/час ) скорость другого 
74 + 66 = 140 ( км/час ) скорость удаления
140 х 7 = 980 ( км )
Ответ 980 км

Answer 2

Problem Analysis

Two cars are traveling in opposite directions from the same city. The speed of one car is 74 km/h, which is 8 km/h faster than the speed of the other car. We need to find the distance between them after 7 hours of travel.

Solution

To find the distance between the two cars after 7 hours, we need to calculate the total distance traveled by each car.

Let's assume the speed of the slower car is x km/h. The speed of the faster car is then x + 8 km/h.

The distance traveled by each car can be calculated using the formula: distance = speed × time.

For the slower car: - Speed = x km/h - Time = 7 hours - Distance = x × 7 km

For the faster car: - Speed = x + 8 km/h - Time = 7 hours - Distance = (x + 8) × 7 km

The distance between the two cars after 7 hours will be the difference between their distances traveled: Distance between the cars = (x + 8) × 7 - x × 7 km.

Let's calculate the distance between the cars.

Calculation

Using the given information, we can calculate the distance between the two cars after 7 hours.

Let's assume the speed of the slower car is x km/h.

The speed of the faster car is then x + 8 km/h.

The distance between the cars after 7 hours is given by the formula: Distance between the cars = (x + 8) × 7 - x × 7 km.

Substituting the values, we get: Distance between the cars = (x + 8) × 7 - x × 7 km.

Simplifying the equation, we have: Distance between the cars = 7x + 56 - 7x km.

The x terms cancel out, and we are left with: Distance between the cars = 56 km.

Therefore, the distance between the two cars after 7 hours of travel is 56 km.

Answer

The distance between the two cars after 7 hours of travel is 56 km.

Please let me know if you need any further assistance.