Question

Поезд прошел без остановок 420 км со скоростью 70 км/ч,затем он сделал остановку на 14 мин, а остальные 300 км прошел со скоростью 75 км/ч сколько времени было затрачено на весь путь? ПОМОГИТЕ ПОЖАЛУЙСТА

Answer 1

420:70=6часов ехал до остановки

300:75=4часа после остановки

6ч+4ч=10часов был в пути +14мин остановка

ответ 10ч 14 мин с остановкой

Answer 2

Calculation of Total Time Taken

To calculate the total time taken for the entire journey, we need to consider the time taken for each segment of the journey separately.

1. First Segment: The train traveled 420 km without any stops at a speed of 70 km/h.

The time taken for this segment can be calculated using the formula: time = distance / speed.

Substituting the values, we get: time = 420 km / 70 km/h = 6 hours.

2. Second Segment: The train made a stop for 14 minutes.

3. Third Segment: The train traveled the remaining 300 km at a speed of 75 km/h.

Similar to the first segment, we can calculate the time taken for this segment using the formula: time = distance / speed.

Substituting the values, we get: time = 300 km / 75 km/h = 4 hours.

To find the total time taken for the entire journey, we add the time taken for each segment:

Total time = Time for first segment + Time for second segment + Time for third segment

Total time = 6 hours + 14 minutes + 4 hours

Now, let's convert the time for the second segment from minutes to hours.

Since there are 60 minutes in an hour, we can convert 14 minutes to hours by dividing it by 60:

14 minutes / 60 = 0.2333 hours

Therefore, the total time taken for the entire journey is:

Total time = 6 hours + 0.2333 hours + 4 hours

Total time = 10.2333 hours

So, the total time taken for the entire journey is approximately 10.2333 hours.

Please note that the above calculation assumes that the train maintains a constant speed throughout each segment and that there are no other factors affecting the journey time.