Question

По дороге ,расположен параллельно ж/д пути ,увидеться велосипедиста со скоростью 8км/ч .в некоторый момент его догоняет движущийся равномерно поезд длинной 120 м и обгоняет его за 6 с . какую скорость имел поезд

Answer 1

За 6 сек. 120 м. За 60 сек. 1200 м. За 60 мин. 72000 м. (поезд относительно велосипедиста едет со скоростью 72 км. /ч) . Сам по себе - 72 + 8 = 80 км. /ч.

Answer 2

Calculation of the Train's Speed

To calculate the speed of the train, we can use the information provided in the question. Let's break down the given information:

- The cyclist's speed is 8 km/h. - The train overtakes the cyclist in 6 seconds. - The length of the train is 120 meters.

To find the speed of the train, we need to convert the length of the train from meters to kilometers and the time from seconds to hours.

1. Convert the length of the train from meters to kilometers: - 120 meters = 0.12 kilometers.

2. Convert the time from seconds to hours: - 6 seconds = 0.00167 hours.

Now, we can calculate the speed of the train using the formula:

Speed = Distance / Time

- Distance = 0.12 kilometers - Time = 0.00167 hours

Substituting the values into the formula:

Speed = 0.12 kilometers / 0.00167 hours

Calculating the result:

Speed = 71.856 kilometers per hour

Therefore, the speed of the train is approximately 71.856 km/h.