Question

Из двух городов одновременно навстречу друг другу выехали два автомашины.Скорость первой 75 км/ч,скорость второй-93 км/ч.Через 4 часа расстояние между городами.Через сколько часов они встретятся?

Answer 1

1)75·4=300 (км) первый проехал
2)93·4=372 (км) второй проехал
3) 300+372=672 (км)
Ответ:между городами 672 километра

Answer 2

Problem Analysis

We are given that two cars start simultaneously from two different cities and are moving towards each other. The speed of the first car is 75 km/h, and the speed of the second car is 93 km/h. We need to determine how many hours it will take for the two cars to meet.

Solution

To solve this problem, we can use the formula:

Time = Distance / Speed

Let's calculate the distance between the two cities using the formula:

Distance = Speed * Time

We are given that the first car has been traveling for 4 hours. Therefore, the distance traveled by the first car is:

Distance1 = Speed1 * Time1 = 75 km/h * 4 h = 300 km Similarly, the distance traveled by the second car is:

Distance2 = Speed2 * Time2 = 93 km/h * Time2

Since the two cars are moving towards each other, the sum of their distances should be equal to the total distance between the cities. Therefore, we can write the equation:

Distance1 + Distance2 = Total Distance

Substituting the values, we get:

300 km + 93 km/h * Time2 = Total Distance

Now, we can solve this equation to find the value of Time2.

Calculation

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

300 km + 93 km/h * Time2 = Total Distance

Since we don't have the value of the total distance between the cities, we cannot calculate the exact time it will take for the two cars to meet. We need additional information to solve this problem.

Please provide the total distance between the cities, and I will be able to calculate the time it will take for the two cars to meet.