Question

Машинист ведёт поезд из одного города в другой. Когда он пробыл в пути 4 ч 45 мин ему оставалось быть в пути на 2 ч 35 мин больше чем он пробыл. За сколько времени машинист должен провести поезд из одного города в другой?

Answer 1

4ч45мин+2ч35мин=7ч20мин(остовалось быть в пути)
4ч45мин+7ч20мин=12ч5мин

Answer 2

Problem Analysis

The problem states that a train driver is traveling from one city to another. After being on the journey for 4 hours and 45 minutes, the driver realizes that they need to be on the journey for 2 hours and 35 minutes longer than they have already been. The question is asking for the total time the driver should spend on the journey from one city to another.

Solution

Let's break down the information given in the problem: - The driver has already been on the journey for 4 hours and 45 minutes. - The driver needs to be on the journey for 2 hours and 35 minutes longer than they have already been.

To find the total time the driver should spend on the journey, we need to add the time the driver has already been on the journey to the additional time they need to spend.

Calculation

To calculate the total time the driver should spend on the journey, we can add the given times:

4 hours and 45 minutes + 2 hours and 35 minutes

To add the hours and minutes, we need to convert the minutes to hours. Since there are 60 minutes in an hour, we can divide the minutes by 60 to get the equivalent hours.

4 hours and 45 minutes + 2 hours and 35 minutes = 4 hours + 2 hours + (45 minutes / 60) hours + (35 minutes / 60) hours

Simplifying the calculation:

4 hours + 2 hours + (45 / 60) hours + (35 / 60) hours = 6 hours + (45 / 60 + 35 / 60) hours

Adding the fractions:

6 hours + (80 / 60) hours = 6 hours + 1 hour and 20 minutes

Converting the 20 minutes back to hours:

6 hours + 1 hour and 20 minutes = 7 hours and 20 minutes

Answer

The train driver should spend a total of 7 hours and 20 minutes on the journey from one city to another.

Verification

To verify the answer, we can check if the additional time of 2 hours and 35 minutes is indeed 2 hours and 35 minutes longer than the time the driver has already spent.

4 hours and 45 minutes + 2 hours and 35 minutes = 7 hours and 20 minutes

The calculated total time matches the additional time given in the problem, so the answer is correct.