Question

Помогите решать задачу)) Электричка за три часа проехала 145 км. Сколько километров она проезжала за каждый из этих часов, если за первые два часа она проехала 98 километров, а за третий час на километра меньше, чем за второй?

Answer 1

1ч+2ч=98км
3ч = 145-98 = 47км
2ч = 47+1=48км
1ч =  98-48=50км

Answer 2

Problem Analysis

We are given that a train traveled 145 km in three hours. We need to determine the distance the train traveled in each of the three hours, given that it traveled 98 km in the first two hours and a distance one kilometer less than the second hour in the third hour.

Solution

Let's break down the problem step by step:

1. The train traveled a total of 145 km in three hours. 2. In the first two hours, it traveled 98 km. 3. In the third hour, it traveled one kilometer less than the second hour.

To find the distance the train traveled in each hour, we can subtract the distance traveled in the first two hours from the total distance traveled. The remaining distance will be the distance traveled in the third hour.

Let's calculate the distance traveled in each hour:

- Distance traveled in the first hour: To be determined - Distance traveled in the second hour: To be determined - Distance traveled in the third hour: To be determined

To find the distance traveled in the first hour, we can subtract the distance traveled in the second and third hours from the total distance traveled:

Distance traveled in the first hour = Total distance - Distance traveled in the second hour - Distance traveled in the third hour

Let's calculate the distance traveled in the first hour:

Distance traveled in the first hour = 145 km - Distance traveled in the second hour - Distance traveled in the third hour

To find the distance traveled in the second hour, we know that it is 98 km.

To find the distance traveled in the third hour, we know that it is one kilometer less than the second hour:

Distance traveled in the third hour = Distance traveled in the second hour - 1 km

Now, let's substitute the known values into the equations and solve for the unknowns:

Distance traveled in the third hour = 98 km - 1 km = 97 km

Distance traveled in the first hour = 145 km - 98 km - 97 km = 50 km

Therefore, the train traveled 50 km in the first hour, 98 km in the second hour, and 97 km in the third hour.

Answer

The train traveled 50 km in the first hour, 98 km in the second hour, and 97 km in the third hour.