Question

из двух поселков одновременно вышли навстречу друг другу два пешехода. расстояние между поселками равно 21 км. первый пешеход шел со скоростью 4 км/ч.второй 3 км/ч. через сколько часов они встретятся?

Answer 1

                                                                  Задача

1 пешеход-3км/ч

2 пешеход-4км/ч

Через сколько встретятса-?

1)4+3=7(км/час)-1 і 2 пешеход

 

2)21:7=3(ч.)

 

21:(4+3)=3

 

Ответ:Они встретятся через 3 часа.

Answer 2

Problem Analysis

Two pedestrians are walking towards each other from two different villages. The distance between the villages is 21 km. The first pedestrian is walking at a speed of 4 km/h, while the second pedestrian is walking at a speed of 3 km/h. We need to determine how many hours it will take for them to meet.

Solution

To solve this problem, we can use the formula:

Time = Distance / Speed

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

Calculation

The distance between the villages is 21 km. The first pedestrian is walking at a speed of 4 km/h, and the second pedestrian is walking at a speed of 3 km/h.

For the first pedestrian: Time1 = Distance / Speed1 = 21 km / 4 km/h = 5.25 hours

For the second pedestrian: Time2 = Distance / Speed2 = 21 km / 3 km/h = 7 hours

Since both pedestrians are walking towards each other, we need to find the total time it will take for them to meet. We can do this by taking the maximum of the two individual times.

Total Time = max(Time1, Time2) = max(5.25 hours, 7 hours) = 7 hours

Therefore, it will take 7 hours for the two pedestrians to meet.

Answer

The two pedestrians will meet in 7 hours.