Question

Два пешехода двигались с одинаковой скоростью.Один прошёл 20км,а другой 12км.С какой скоростью шли пешеходы,если один затратил на дорогу на 2ч больше,чем другой

Answer 1

Пусть х -время1пешехода ,
Х+2-время2пешехода
12/х-скорость1пешехода
20/х+2-сорость2пешехода
12/х=20/х+2
12(х+2)=20х
8х=24
Х=3(час)
12:3=4(км/ч)-скорость пешеходов

Answer 2

Problem Analysis

We are given that two pedestrians are moving at the same speed. One of them covers a distance of 20 km, while the other covers a distance of 12 km. The pedestrian who covered 20 km took 2 hours longer than the other pedestrian. We need to find the speed at which the pedestrians were walking.

Solution

Let's assume the speed at which both pedestrians were walking is x km/h.

We can use the formula distance = speed × time to form two equations based on the given information:

Equation 1: 20 = x × (t + 2), where t is the time taken by the second pedestrian. Equation 2: 12 = x × t

To solve this system of equations, we can substitute the value of t from Equation 2 into Equation 1:

20 = x × (12/x + 2)

Simplifying the equation:

20 = 12 + 2x

2x = 20 - 12

2x = 8

x = 4

Therefore, the speed at which the pedestrians were walking is 4 km/h.

Answer

The pedestrians were walking at a speed of 4 km/h.