Question

Два пешехода вышли одновременно и двух пунктов А и В навстречу друг другу встретились через 20 мин а ещё через 25 мин первый пешеход пришёл в пункт в . Через сколько минут после встречи второй пешеход пришёл пункт А....................... Помогите срочно надо плиззззз......................

Answer 1

второй шел до встречи 20мин.

после встречи первый прошел это же расстояние за 25мин значит надо прибавить 20 и 25   20+25=45мин это первый пешеход шёл от пункта А в пункт В

Т.е скорость второго больше в 25/20=5/4 раза

45*4/5=36мин всего прошел второй

36-20=16мин

ответ : через 16мин

Answer 2

Problem Analysis

We have two pedestrians who start walking towards each other from points A and B. They meet after 20 minutes and the first pedestrian arrives at point A after 25 minutes. We need to determine how long it takes for the second pedestrian to arrive at point A after their meeting.

Solution

Let's break down the problem step by step:

1. The two pedestrians meet after 20 minutes. 2. The first pedestrian arrives at point A after 25 minutes. 3. We need to find out how long it takes for the second pedestrian to arrive at point A after their meeting.

To solve this problem, we can use the information given and some basic math.

Let's assume the speed of the first pedestrian is x and the speed of the second pedestrian is y.

From the given information, we can deduce the following equations:

1. Distance covered by the first pedestrian in 20 minutes = Distance covered by the second pedestrian in 20 minutes. 2. Distance covered by the first pedestrian in 25 minutes = Distance covered by the second pedestrian in (20 + t) minutes, where t is the time taken by the second pedestrian to reach point A after their meeting.

Using the formula distance = speed × time, we can write the following equations:

1. 20x = 20y (Equation 1) 2. 25x = (20 + t)y (Equation 2)

We can solve these equations to find the value of t.

Let's solve the equations:

From Equation 1, we can simplify it to x = y.

Substituting this value in Equation 2, we get:

25x = (20 + t)x

Simplifying further, we get:

25 = 20 + t

Solving for t, we find:

t = 5 minutes

Therefore, the second pedestrian arrives at point A 5 minutes after their meeting.

Answer

The second pedestrian arrives at point A 5 minutes after their meeting.