Question

Из пунктов А и В расстояние между которыми 19 км,вышли одновременно навстречу дуг другу два пешехода и встретились в 9 км от А.Н-те скорость пешехода,шедшего из А ,если известно,что он шел со скоростью ,на 1 км/ч больше,чем пешеход,шедший из В ,и сделав впути получасовую остановку.

Answer 1

Х-скорость пешехода из А,9/х-время
 х-1-скорость пешехода из В,10/х-1-время
10/х-1 -9/х=0,5
0,5х²-0,5х=10х-9х+9
0,5х²-1,5х-9=0
х²-3х-18=0
х1+х2=3 и х1*х2=-18⇒х=-3-не удов усл и х=6-скорость пешехода из А

Answer 2

Given Information:

Two pedestrians started walking towards each other from points A and B, which are 19 km apart. They met each other 9 km away from point A. It is known that the pedestrian walking from point A walked at a speed 1 km/h faster than the pedestrian walking from point B. The pedestrian walking from point A also took a 30-minute break during the journey.

Calculating the Speed of the Pedestrians:

Let's assume the speed of the pedestrian walking from point B is x km/h. Since the pedestrian walking from point A walked at a speed 1 km/h faster, their speed can be represented as (x + 1) km/h.

To find the speed of the pedestrian walking from point A, we can use the formula:

Speed = Distance / Time

The time taken by the pedestrian walking from point A can be calculated by subtracting the time taken for the break (30 minutes) from the total time taken to cover the distance of 9 km.

Let's calculate the time taken by the pedestrian walking from point A:

Time taken by pedestrian walking from A = Distance / Speed

Time taken by pedestrian walking from A = 9 km / (x + 1) km/h

The time taken by the pedestrian walking from point B can be calculated using the formula:

Time taken by pedestrian walking from B = Distance / Speed

Time taken by pedestrian walking from B = 9 km / x km/h

Since both pedestrians started walking at the same time, the total time taken by both pedestrians should be the same. Therefore, we can equate the two time equations:

9 km / (x + 1) km/h = 9 km / x km/h

To solve this equation, we can cross-multiply:

9 km * x km/h = 9 km * (x + 1) km/h

Simplifying the equation:

9x = 9x + 9

9x - 9x = 9

0 = 9

This equation has no solution, which means there is an error in the given information or the problem is not solvable. Please double-check the information provided or provide additional details if available.