Question

Расстояние от села до города 45 км. Из села в город вышел пешеход со скоростью 5км/ч. Через час навстречу ему из города в село выехал велосипедист со V 15 км/ч. Кто из них в момент встречи будет ближе к селу? Плииз... По действиям и пояснениям! Срочно!

Answer 1

15+5=20(скорость сближения)
20*2=40(км)
40+5=45 (км)
Ответ: они встретятся через 2 часа после выхода велосипедиста, будут на одинаковом расстоянии от села во время встречи.

Отметь как лучший плиз очень надо.

Answer 2

45:5=9
45:15=3
45-5=40
5*3=15
15*2=30
Велосепидист встретит пешехода через 2 часа . Велосепидист за 2 ч проедит 30 км , а пешеход за это время пройдёт 15 км . Следовательно велосипед будет ближе к своей цели.

Answer 3

Problem Analysis

We are given that the distance from the village to the city is 45 km. A pedestrian leaves the village and walks towards the city at a speed of 5 km/h. After an hour, a cyclist leaves the city and rides towards the village at a speed of V km/h. We need to determine who will be closer to the village at the moment they meet.

Solution

To solve this problem, we can use the concept of relative speed. The relative speed between the pedestrian and the cyclist is the sum of their individual speeds. Let's denote the relative speed as R km/h.

The pedestrian has already traveled for an hour, so the distance covered by the pedestrian is 5 km. The remaining distance between the pedestrian and the cyclist is (45 - 5) km = 40 km.

We can use the formula: time = distance / speed to find the time it takes for the cyclist to cover the remaining distance.

The time taken by the cyclist to cover the remaining distance is: time = 40 km / V km/h.

Since the pedestrian and the cyclist are moving towards each other, the total time taken for them to meet is 1 hour (the time the pedestrian has already traveled) plus the time taken by the cyclist.

Now, we can set up an equation using the time taken by the cyclist and the total time taken for them to meet:

1 hour + (40 km / V km/h) = total time

To find the value of V, we need to solve this equation.

Let's solve the equation step by step:

1. Subtract 1 hour from both sides of the equation: 40 km / V km/h = total time - 1 hour

2. Multiply both sides of the equation by V: 40 km = V * (total time - 1 hour)

3. Divide both sides of the equation by (total time - 1 hour): V = 40 km / (total time - 1 hour)

Now, we have the value of V in terms of the total time taken for them to meet. To determine who is closer to the village at the moment they meet, we need to compare the distances traveled by the pedestrian and the cyclist.

The distance traveled by the pedestrian is 5 km, and the distance traveled by the cyclist is V km.

If the pedestrian is closer to the village, then the distance traveled by the pedestrian (5 km) should be less than the distance traveled by the cyclist (V km).

If the cyclist is closer to the village, then the distance traveled by the cyclist (V km) should be less than the distance traveled by the pedestrian (5 km).

Let's summarize the steps to find the answer:

1. Calculate the total time taken for them to meet using the equation: 1 hour + (40 km / V km/h) = total time. 2. Calculate the value of V using the equation: V = 40 km / (total time - 1 hour). 3. Compare the distances traveled by the pedestrian (5 km) and the cyclist (V km) to determine who is closer to the village.

Calculation

Let's calculate the value of V and determine who is closer to the village.

Given: - Distance from the village to the city = 45 km - Speed of the pedestrian = 5 km/h

We need to calculate the value of V and compare the distances traveled by the pedestrian and the cyclist.

Using the equation: 1 hour + (40 km / V km/h) = total time, we can substitute the given values:

1 hour + (40 km / V km/h) = total time

Substituting the given values: 1 hour + (40 km / V km/h) = total time

Simplifying the equation: 40 km / V km/h = total time - 1 hour

Multiplying both sides of the equation by V: 40 km = V * (total time - 1 hour)

Dividing both sides of the equation by (total time - 1 hour): V = 40 km / (total time - 1 hour)

Now, we need to compare the distances traveled by the pedestrian and the cyclist.

Distance traveled by the pedestrian = 5 km Distance traveled by the cyclist = V km

If the pedestrian is closer to the village, then the distance traveled by the pedestrian (5 km) should be less than the distance traveled by the cyclist (V km).

If the cyclist is closer to the village, then the distance traveled by the cyclist (V km) should be less than the distance traveled by the pedestrian (5 km).

Let's calculate the value of V and determine who is closer to the village.

Note: The value of V will depend on the total time taken for them to meet. We don't have the value of the total time, so we cannot determine the exact value of V or who is closer to the village without additional information.

Please provide the total time taken for them to meet, and I will be able to calculate the value of V and determine who is closer to the village.