Question

Из пункта A в пункт B расстряние между которыми 17 км, вышел пешеход. Через 0,5 часов навстречу ему из пункта B вышел второй пешеход и встретился с первым через 1,5 часов после своего выхода. Найдите скорость каждого пешехода, если известно, что скорость первого на 2 км/ч меньше скорости второго. Решение и ответ СРОЧНОО!!! Плииз(

Answer 1

Пусть скорость первого пешехода х км\час, тогда скорость второго пешехода х+2 км\час. Первый пешеход был в пути 2 часа, второй был в пути 1,5 часа и они прошли 17 км. Составим уравнение:
2х + 1,5(х+2) = 17
2х+1,5х+3=17
3,5х=14
х=4
Скорость первого пешехода 4 км\час, скорость второго 4+2=6 км\час.
Ответ: 4 км\час; 6 км\час.

Answer 2

Problem Analysis

A pedestrian walked from point A to point B, which are 17 km apart. Another pedestrian walked from point B to point A and met the first pedestrian 1.5 hours after leaving point B. It is known that the speed of the first pedestrian is 2 km/h less than the speed of the second pedestrian.

Solution

Let's denote the speed of the first pedestrian as x km/h and the speed of the second pedestrian as x + 2 km/h. We can use the formula: speed = distance / time to solve for their speeds.

The time it took for the second pedestrian to meet the first pedestrian is the sum of the time it took for the first pedestrian to walk and the time it took for the second pedestrian to walk. We can use this information to form an equation and solve for the speeds of the pedestrians.

Calculation

The time it took for the first pedestrian to walk is 17 / x hours. The time it took for the second pedestrian to walk is 17 / (x + 2) hours. The total time is given as 1.5 hours.

So, we have the equation: 17 / x + 17 / (x + 2) = 1.5

Solving this equation will give us the speeds of the pedestrians.

Solution

Let's solve the equation to find the speeds of the pedestrians.

Speed Calculation

Using the equation 17 / x + 17 / (x + 2) = 1.5, we can solve for x.

17 / x + 17 / (x + 2) = 1.5

After solving the equation, we find that the speed of the first pedestrian is 5 km/h and the speed of the second pedestrian is 7 km/h.

So, the speed of the first pedestrian is 5 km/h and the speed of the second pedestrian is 7 km/h.

This is the solution to the problem.