Question

Скорость поезда 44 км.ч, скорость человека 4 км.ч.Поезд проезжает человека за 36сек.Найдите длину поезда, ответ дайте в метрах

Answer 1

Если человек движется против поезда, то скорость поезда относительно человека равна 44 - 4 = 40 км/ч. 36 сек составляют 36/3600 = 0,01 часа, и длина поезда в метрах равна 40*0,01*1000 = 400 метров.

Если человек движется по ходу поезда, то скорость поезда относительно человека равна 44+4 = 48 км/ч, и длина поезда в метрах составит 48*0,01*1000 = 480 метров.

Answer 2

Given Information:

- Speed of the train: 44 km/h - Speed of the person: 4 km/h - The train passes the person in 36 seconds

Calculating the Length of the Train:

To find the length of the train, we can use the formula:

Length of the train = (Relative speed of train and person) × Time taken for the train to pass the person

The relative speed of the train and the person is the difference between their speeds. In this case, it is 44 km/h - 4 km/h = 40 km/h.

Now, we need to convert the relative speed from km/h to m/s, as the time is given in seconds.

1 km/h = 1000 m/3600 s = 10/36 m/s

Therefore, the relative speed of the train and the person is (40 × 10/36) m/s.

Using the formula, the length of the train can be calculated as follows:

Length of the train = (Relative speed of train and person) × Time taken for the train to pass the person

Substituting the values:

Length of the train = (40 × 10/36) m/s × 36 s

Simplifying the equation:

Length of the train = (40 × 10 × 36) / (36 × 36) m

Calculating the length of the train:

Length of the train = 400 / 36 m

Converting the length of the train to meters:

Length of the train = 11.11 meters

Therefore, the length of the train is approximately 11.11 meters.