Question

пішохід іде паралельно залізничній колії зі швидкістю 6км\год . Назустріч йому рухається рівномірно поїзд зі швидкістю 54км\год знайди довжину поїзда в метрах , якщо він приїжджає повз пішохода за 30с Даю 20 балов​

Answer 1

Ответ:

1) 54+6=60- шв ближнего

2) 60•1000. 50

_________ =_____ м/с.

3600. 3

50

_____ •30=500(м)

3

Answer 2

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

Length of train = (Relative speed × Time taken) / Speed of train

Given: - Speed of the pedestrian = 6 km/h - Speed of the train = 54 km/h - Time taken for the train to pass the pedestrian = 30 seconds

First, let's convert the speeds from km/h to m/s: - Speed of the pedestrian = 6 km/h = (6 × 1000) / 3600 = 1.67 m/s - Speed of the train = 54 km/h = (54 × 1000) / 3600 = 15 m/s

Now, let's substitute the values into the formula: Length of train = (Relative speed × Time taken) / Speed of train Length of train = ((15 + 1.67) × 30) / 15

Calculating this, we find: Length of train = 31.67 meters

Therefore, the length of the train is approximately 31.67 meters.

Please note that the above calculation assumes that the pedestrian and the train are moving in the same direction. If they are moving in opposite directions, the relative speed would be the sum of their individual speeds.