Question

Поезд длиной 490м едет со скоростью 20м/с.За сколько времени проедет поезд мимо 8телеграфных столбов ,расположенных на расстоянии 50м друг от друга ? помогите пожалуйста срочно

Answer 1

50*7отрезков между столбами=350 метров
350+490(длина поезда)=840 метров
840/20=42 секунды
Ответ:42 секунды

Answer 2

Calculating the Time for the Train to Pass Telegraph Poles

To calculate the time it takes for the train to pass the telegraph poles, we can use the formula:

Time = Distance / Speed

Given: - Length of the train (L) = 490 m - Speed of the train (v) = 20 m/s - Distance between the telegraph poles (d) = 50 m

We need to find the time it takes for the train to pass 8 telegraph poles.

Calculating the Total Distance Covered by the Train

The total distance covered by the train while passing 8 telegraph poles can be calculated as follows:

Total Distance = Length of the train + Distance between poles * Number of poles

Substituting the given values: Total Distance = 490m + 50m * 8

Calculating the Time Taken

Now, we can use the formula Time = Distance / Speed to find the time taken for the train to cover the total distance.

Time = Total Distance / Speed

Substitute the calculated total distance and the given speed to find the time taken for the train to pass the 8 telegraph poles.

Calculating the Result

Let's calculate the total distance covered by the train and the time it takes for the train to pass the 8 telegraph poles.