Question

Из пунктов А и Б одновременно в одном направлении выехала 2 поезда.Скорость первого поезда равна 80 км/ч,а скорость второго поезда,идущего вдогонку первому поезду,равна 110 км/ч.Встреча произошлачерез 4 ч после выезда поездов.На каком расстоянии друг от друга находятсьпункты А и Б??? Помогите срочно!!!

Answer 1

1)80+110+190(км/ч)-скорость сближения.
2)190*4=1260(км)расстояние между пунктами А и Б.
Ответ:1260 км расстояние между пунктами А и Б.

Answer 2

1)80км/ч-•4ч=320 км- прошел 1 поезд2)110•4=440км- прошел 2 поезд3)440-320=120км- расстояние между пунктами А и В

Answer 3

Problem Analysis

Two trains, A and B, are traveling in the same direction. Train A is traveling at a speed of 80 km/h, and train B, which is chasing train A, is traveling at 110 km/h. They meet 4 hours after the departure of the trains. We need to find the distance between points A and B.

Solution

To solve this problem, we can use the formula: distance = speed * time.

First, let's find the distance traveled by train A and train B separately. Then, we can use the relative speed of the two trains to find the distance between points A and B.

Distance Traveled by Train A

The distance traveled by train A can be calculated using the formula: distance = speed * time. - Speed of train A = 80 km/h - Time taken = 4 hours - Therefore, distance traveled by train A = 80 km/h * 4 h = 320 km

Distance Traveled by Train B

The distance traveled by train B can also be calculated using the formula: distance = speed * time. - Speed of train B = 110 km/h - Time taken = 4 hours - Therefore, distance traveled by train B = 110 km/h * 4 h = 440 km

Relative Distance between Points A and B

The relative distance between points A and B can be found by subtracting the distance traveled by train A from the distance traveled by train B. - Relative distance = Distance traveled by train B - Distance traveled by train A - Relative distance = 440 km - 320 km = 120 km

The distance between points A and B is 120 km.

(#1)