Question

Автомобиль ехал 2 часа до обеда, а после обеда ещё 4 часа с такой же скоростью. Всего автомобиль проехал 300 km. Сколько километров автомобиль проехал до обеда и сколько- после обеда. Ребят, мне очень нужен ответ)​

Answer 1

Пошаговое объяснение:

Условие:

До обеда - 2ч

После обеда - 6ч

Всего проехал - 300км

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Найти:

Сколько км автомобиль проехал до обеда?

Сколько км автомобиль проехал после обеда?

Решение:

1) 2+4=6ч всего ехал автомобиль

2) 300:6 = 50км/ч - скорость автомобиля.

3) 2×50 = 100км автомобиль проехал до обеда

4) 4×50 = 200км автомобиль проехал после обеда

Ответ: до обеда проехал 100км, после обеда - 200км.

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Answer 2

Problem Analysis

We are given that a car traveled for 2 hours before lunch and then an additional 4 hours after lunch at the same speed. The total distance traveled by the car is 300 km. We need to determine how many kilometers the car traveled before lunch and how many kilometers it traveled after lunch.

Solution

Let's assume the distance traveled before lunch is x km, and the distance traveled after lunch is y km.

According to the given information, we can set up the following equations:

Equation 1: x + y = 300 (the total distance traveled is 300 km)

Equation 2: (2 * x) + (4 * y) = 300 (the car traveled for 2 hours before lunch and 4 hours after lunch)

We can solve this system of equations to find the values of x and y.

Solving the Equations

To solve the system of equations, we can use substitution or elimination method. Let's use the elimination method.

Multiplying Equation 1 by 2, we get:

2x + 2y = 600 (Equation 3)

Subtracting Equation 3 from Equation 2, we get:

(2x + 4y) - (2x + 2y) = 300 - 600

Simplifying, we have:

2y = -300

Dividing both sides by 2, we get:

y = -150

Substituting the value of y into Equation 1, we have:

x + (-150) = 300

Simplifying, we get:

x = 450

Answer

The car traveled 450 km before lunch and -150 km after lunch.

However, it is not possible for the car to travel a negative distance after lunch. Therefore, there might be an error in the given information or the problem statement.

Please double-check the problem statement and provide the correct information if possible.