Question

Из двух городов одновременно навтречу друг другу выехали две автомашины. скорость первой была 75км/ч, другой- 93км/ч. через 4 часа расстояние между ними было равно 168 км. найди расстояние между городами. через Сколько часов они встретятся?

Answer 1

1)(75+93)•4=672
2)672+168=840 км- расстояние между городами
3)840:(75+93)=5 часов-встретятся

Answer 2

1) 93+75=168(км/ч.) - общая скорость.
2) 168*4=672(км.) - расстояние, пройденое за 4 часа.
3) 672+168=840(км.) - расстояние между городами.
4) 840/168=5(ч.)время встречи
Ответ:они встретятся через 5 часов.

Answer 3

Problem Analysis

Two cars are traveling towards each other from two different cities. The first car is traveling at a speed of 75 km/h, and the second car is traveling at a speed of 93 km/h. After 4 hours, the distance between them is 168 km. We need to find the distance between the two cities and the time it will take for them to meet.

Solution

To find the distance between the two cities, we can use the formula:

Distance = Speed x Time

Let's calculate the distance traveled by each car after 4 hours:

- The first car traveled a distance of 75 km/h x 4 h = 300 km. - The second car traveled a distance of 93 km/h x 4 h = 372 km.

Now, let's find the total distance between the two cities:

- The distance traveled by the first car + the distance traveled by the second car = 300 km + 372 km = 672 km.

Therefore, the distance between the two cities is 672 km.

To find the time it will take for the two cars to meet, we can use the formula:

Time = Distance / Relative Speed

The relative speed is the sum of the speeds of the two cars:

- Relative speed = 75 km/h + 93 km/h = 168 km/h.

Let's calculate the time it will take for the two cars to meet:

- Time = 672 km / 168 km/h = 4 hours.

Therefore, the two cars will meet after 4 hours.

Answer

The distance between the two cities is 672 km. The two cars will meet after 4 hours.

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