Question

расстояние между городами 345 км. одновременно навстречу друг другу вышли 2 поезда. скорость одного 55км ч. другого 60 км ч через сколько часов поезда встретились

Answer 1

1)55+60=115(км/ч)--скорость сближения друг к другу

2)345:115=3(ч)с

Answer 2

Problem Analysis

We have two trains traveling towards each other on the same track. The distance between the cities is 345 km. The first train is traveling at a speed of 55 km/h, and the second train is traveling at a speed of 60 km/h. We need to determine how many hours it will take for the trains to meet.

Solution

To find the time it takes for the trains to meet, we can use the formula:

Time = Distance / Relative Speed

The relative speed is the sum of the speeds of the two trains since they are traveling towards each other.

Let's calculate the time it takes for the trains to meet:

Relative Speed = Speed of Train 1 + Speed of Train 2

Relative Speed = 55 km/h + 60 km/h = 115 km/h

Time = Distance / Relative Speed

Time = 345 km / 115 km/h

Time = 3 hours

Therefore, the trains will meet after 3 hours.