Question

Скорость электрички 50км/ч она должна пройти на своем пути 3 перегона длиной 12км 15км 18км сделав 2 остановки по 1/20 часа сколько потребуется всего времени на весь маршрут

Answer 1

2]50*12=600км.ч

1]50*3=150км.ч

Answer 2

Calculation of Total Time for the Train Journey

To calculate the total time required for the train to complete the entire route, we need to consider the distance covered in each section, the speed of the train, and the duration of the stops.

Given information: - Speed of the train: 50 km/h - Length of the three sections: 12 km, 15 km, and 18 km - Duration of each stop: 1/20 hour (3 minutes)

To calculate the total time, we need to consider the following steps:

1. Calculate the time taken to travel each section. 2. Add the time taken for each stop. 3. Sum up the times for all sections and stops to get the total time.

Let's calculate the time for each step.

Step 1: Calculate the Time Taken to Travel Each Section

To calculate the time taken to travel each section, we can use the formula:

Time = Distance / Speed

For the three sections, the time taken will be:

- Time taken for the 12 km section: 12 km / 50 km/h = 0.24 hours - Time taken for the 15 km section: 15 km / 50 km/h = 0.3 hours - Time taken for the 18 km section: 18 km / 50 km/h = 0.36 hours

Step 2: Add the Time Taken for Each Stop

The train makes two stops, and each stop lasts for 1/20 hour (3 minutes). So, the total time for the stops will be:

- Total time for the two stops: 2 * (1/20) hour = 1/10 hour

Step 3: Calculate the Total Time

To calculate the total time, we need to sum up the times for all sections and stops:

- Total time = Time for sections + Time for stops - Total time = (0.24 + 0.3 + 0.36) hours + (1/10) hour

Now, let's calculate the total time:

- Total time = 0.9 hours + 1/10 hour - Total time = 0.9 + 0.1 = 1 hour

Therefore, the train will take a total of 1 hour to complete the entire route, including the stops.

Please note that the calculation assumes a constant speed throughout the journey and does not consider any other factors that may affect the train's travel time.