Question

Железнодорожный состав двигаясь с постоянной скоростью полностью проезжает мост длинной 200 метров за 75 сек а мимо неподвижного человека за 1 минуту Определить длину поезда и его скорость

Answer 1

найдешь скорость v=L/t1
мимо человека уже просто S=v*t2

Answer 2

Calculation of Train Length and Speed

To determine the length of the train and its speed, we can use the information provided:

- The train completely passes a bridge with a length of 200 meters in 75 seconds. - The train passes a stationary person in 1 minute (60 seconds).

Let's calculate the length of the train and its speed step by step:

1. Calculate the speed of the train: - The train passes the bridge with a length of 200 meters in 75 seconds. - Speed = Distance / Time = 200 meters / 75 seconds = 2.67 meters per second.

2. Calculate the time it takes for the train to pass the stationary person: - The train passes the person in 1 minute (60 seconds). - Time = 60 seconds.

3. Calculate the distance traveled by the train in 60 seconds: - Distance = Speed * Time = 2.67 meters per second * 60 seconds = 160 meters.

4. Calculate the length of the train: - The train travels 160 meters in 60 seconds. - The length of the train is equal to the distance traveled by the train in 60 seconds. - Therefore, the length of the train is 160 meters.

5. Calculate the speed of the train in kilometers per hour: - Convert the speed from meters per second to kilometers per hour. - 1 meter per second is equal to 3.6 kilometers per hour. - Speed = 2.67 meters per second * 3.6 kilometers per hour = 9.6 kilometers per hour.

Therefore, the length of the train is 160 meters and its speed is 9.6 kilometers per hour.

Please note that the calculations provided are based on the information given and may not be exact due to rounding or other factors.