Question

Из двух населёных пунктов расстояние между которыми 54км одновременно навстречу друг другу вышли два пешехода. скорость первого пешехода равна 4 км/ч а скорость второго-5 км/ч.через какое время они встретятся?

Answer 1

4 + 5 = 9 км/ч - скорость сближения
54 : 9 = 6 ч - время в пути
Ответ . Через 6 часов они встетятся

Answer 2

1) 54:(4➕9). Вот так!

Answer 3

Problem Analysis

We are given that two pedestrians start walking towards each other from two different towns that are 54 km apart. The first pedestrian has a speed of 4 km/h, while the second pedestrian has a speed of 5 km/h. We need to determine how long it will take for them to meet.

Solution

To solve this problem, we can use the formula: time = distance / speed. Since the pedestrians are walking towards each other, we can add their speeds to find the relative speed at which they are approaching each other.

Let's calculate the time it will take for the pedestrians to meet:

1. Calculate the relative speed of the pedestrians: - The first pedestrian's speed is 4 km/h. - The second pedestrian's speed is 5 km/h. - The relative speed is the sum of their speeds: 4 km/h + 5 km/h = 9 km/h.

2. Calculate the time it will take for the pedestrians to meet: - The distance between the two towns is 54 km. - Using the formula time = distance / speed, we can calculate the time it will take for them to meet: time = 54 km / 9 km/h = 6 hours.

Therefore, it will take the pedestrians 6 hours to meet.

Answer

The pedestrians will meet after 6 hours.

Explanation

The first pedestrian has a speed of 4 km/h, and the second pedestrian has a speed of 5 km/h. When they start walking towards each other from two different towns that are 54 km apart, their relative speed is the sum of their speeds, which is 9 km/h. Using the formula time = distance / speed, we can calculate that it will take them 6 hours to meet, as the distance between the towns is 54 km and the relative speed is 9 km/h