Question

Два автомобиля едут навстречу друг другу. Скорость одного из них 70 километров в час, другого 80 километров в час. Через сколько часов они встретятся? Если после встречи каждый продолжит движение в том же направлении, то через сколько часов после встречи расстояние между ними станет равным 300 км?

Answer 1

Находи скорость сближения   70+80=150 км/ч между ними 450 км, ищешь время встречи   450:150= 3 часа   через 3 часа они встретятся
б)теперь они будут ехать в разные стороны после встречи.... ищешь время, за которое они проедут 300км     300:(70+80)= 2 часа   через 2 часа расстояние будет 300км

Answer 2

Calculation of the Meeting Time:

To calculate the time it takes for two cars to meet when they are traveling towards each other, we can use the formula:

Time = Distance / Relative Speed

In this case, the relative speed is the sum of the speeds of the two cars, which is 70 km/h + 80 km/h = 150 km/h.

Let's calculate the meeting time:

Time = Distance / Relative Speed

Time = Distance / (70 km/h + 80 km/h)

Since the distance is not given, we cannot calculate the exact meeting time without that information. If you provide the distance, I can help you calculate the meeting time.

Calculation of the Distance after the Meeting:

To calculate the time it takes for the distance between the two cars to become 300 km after they have met and continue moving in the same direction, we need to consider their relative speed.

The relative speed of the two cars when they are moving in the same direction is the difference between their speeds, which is 80 km/h - 70 km/h = 10 km/h.

Let's calculate the time it takes for the distance between them to become 300 km:

Time = Distance / Relative Speed

Time = 300 km / 10 km/h

Time = 30 hours

Therefore, it will take 30 hours for the distance between the two cars to become 300 km after they have met and continue moving in the same direction.

Please note that these calculations assume constant speeds and no other factors affecting the motion of the cars.