Question

Из одного пункта в противоположных направлениях одновременно выехали две автомашины со скоростями 60 км ч и 80 км ч Какое расстояние будет между ними через 3 часа Решите задачу двумя способами

Answer 1

Способ 1:
1) 60+80 = 140 км/ч - скорость удаления
2) 140 * 3 = 420 км будет между ними через 3 часа

Способ 2:
1) 60*3 = 180 км проедет одна машина за 3 часа
2) 80 * 3 = 240 км проедет другая машина за 3 часа
3) 180+240 = 420 км будет между машинами через 3 часа

Answer 2

Problem Statement

Две автомашины выехали из одного пункта в противоположных направлениях одновременно. Скорость первой машины составляет 60 км/ч, а скорость второй машины - 80 км/ч. Найдите расстояние между ними через 3 часа. Решите задачу двумя способами.

Solution 1: Using Relative Speed

To find the distance between the two cars after 3 hours, we can calculate the total distance covered by both cars and then subtract their initial distance.

The first car travels at a speed of 60 km/h for 3 hours, covering a distance of 60 km/h * 3 h = 180 km. The second car travels at a speed of 80 km/h for 3 hours, covering a distance of 80 km/h * 3 h = 240 km.

The total distance covered by both cars is 180 km + 240 km = 420 km.

Since the cars are moving in opposite directions, we can subtract their initial distance to find the distance between them. However, the problem statement does not provide the initial distance between the cars. Therefore, we cannot determine the exact distance between them using this method.

Solution 2: Using Relative Speed and Time

Another way to solve this problem is by considering the relative speed of the two cars and the time they have been traveling.

The relative speed of the two cars is the sum of their individual speeds, which is 60 km/h + 80 km/h = 140 km/h.

Using the formula distance = speed * time, we can calculate the distance between the two cars after 3 hours: distance = relative speed * time = 140 km/h * 3 h = 420 km.

Therefore, the distance between the two cars after 3 hours is 420 km.

Please note that the exact distance between the cars cannot be determined without knowing their initial distance from each other.

Conclusion

The distance between the two cars after 3 hours is 420 km. However, without knowing their initial distance, we cannot determine the exact distance between them.