Question

Два пешехода вышли одновременно на встречу друг друг из пунктов A и B! Скорость первого пешехода a км/ч, скорость второго-на 1 км/ч больше! Чему равно расстояние между A и B если пешеходы встретились через 2 часа?

Answer 1

(a+1+a)*2
Ответ:Расстояние 

Answer 2

Problem Analysis

We are given that two pedestrians start walking towards each other simultaneously from points A and B. The speed of the first pedestrian is a km/h, and the speed of the second pedestrian is 1 km/h faster than the first. We need to find the distance between points A and B if the pedestrians meet after 2 hours.

Solution

To find the distance between points A and B, we can use the formula: distance = speed * time.

Let's assume the speed of the first pedestrian is v km/h. Then the speed of the second pedestrian is (v + 1) km/h.

The first pedestrian will cover a distance of v * 2 km in 2 hours, and the second pedestrian will cover a distance of (v + 1) * 2 km in 2 hours.

Since they are walking towards each other, the sum of their distances should be equal to the distance between points A and B.

Therefore, the equation becomes: v * 2 + (v + 1) * 2 = distance.

Simplifying the equation, we get: 2v + 2v + 2 = distance.

Simplifying further, we have: 4v + 2 = distance.

Now, let's find the value of v.

Calculation

From the given information, we know that the pedestrians meet after 2 hours. Therefore, the total distance they cover in 2 hours is equal to the distance between points A and B.

Substituting the values into the equation, we have: 4v + 2 = 2v * 2.

Simplifying the equation, we get: 4v + 2 = 4v.

Subtracting 4v from both sides, we have: 2 = 0.

This equation is not possible to solve, as it leads to an inconsistency. It means that there is no valid solution for the given problem.

Answer

Based on the given information, it is not possible to determine the distance between points A and B.