Question

Путешественник 3 ч ехал на автобусе и 3 ч – на поезде, преодолев за это время путь в 390 км. Найдите скорость автобуса, если она втрое меньше скорости поезда. решите задачу пожалуйста

Answer 1

пусть х-скорость автобуса, тогда 3х-скорость поезда

(х+3х)*3=390

4х=390:3

4х=130

х=130:4

х=32,5 км/ч -скорость автобуса

32,5*3=97,5 км/ч-скорость поезда

вроде так

Answer 2

Problem Analysis

We are given that a traveler spent 3 hours on a bus and 3 hours on a train, covering a total distance of 390 km. We need to find the speed of the bus, given that it is three times slower than the speed of the train.

Solution

Let's assume the speed of the train is x km/h. Since the bus is three times slower, its speed will be x/3 km/h.

We can use the formula speed = distance / time to find the speed of the train and the bus.

For the train: - Distance = 390 km - Time = 3 hours

For the bus: - Distance = 390 km - Time = 3 hours

Let's calculate the speeds of the train and the bus.

Calculation

Speed of the train: - Distance = 390 km - Time = 3 hours

Using the formula speed = distance / time, we can calculate the speed of the train: x = 390 / 3 km/h

Speed of the bus: - Distance = 390 km - Time = 3 hours

Using the formula speed = distance / time, we can calculate the speed of the bus: (x/3) = 390 / 3 km/h

Answer

The speed of the bus is 130 km/h.

Explanation

The speed of the train is calculated by dividing the distance traveled (390 km) by the time taken (3 hours). The speed of the bus is calculated by dividing the same distance by the same time, but since the bus is three times slower, we divide the speed of the train by 3. Therefore, the speed of the bus is 130 km/h.