Question

От железнодорожной станции в 12:00 противоположных направлениях отошли два электропоезда Какое расстояние будет между ними в 12:15 минут если один электропоезд движется со скоростью 72 километров в час а другой 84 километров в час

Answer 1

Расстояние будет 39 км. один поезд за 15 мин. проехал 18 км, а второй - 21 км. 18+21=39 км. 1 час=60 мин. 15 мин.=1/4 часа. 72÷4=18 км первый поезд 84÷4=21 км. второй поезд 18+21=39 км. расстояние между поездами через 15 мин.

Answer 2

Calculation of Distance Between Two Trains

To calculate the distance between two trains that departed from a railway station in opposite directions at 12:00 and determine their positions at 12:15, we need to consider the speeds of the trains and the time elapsed.

Given: - Train 1 is traveling at a speed of 72 kilometers per hour. - Train 2 is traveling at a speed of 84 kilometers per hour.

To find the distance between the two trains at 12:15, we need to calculate the distance each train has traveled in 15 minutes (0.25 hours).

Calculation for Train 1:

Distance traveled by Train 1 = Speed of Train 1 * Time Distance traveled by Train 1 = 72 km/h * 0.25 h

Calculation for Train 2:

Distance traveled by Train 2 = Speed of Train 2 * Time Distance traveled by Train 2 = 84 km/h * 0.25 h

Now, let's calculate the distances traveled by each train:

Distance traveled by Train 1 = 72 km/h * 0.25 h = 18 km Distance traveled by Train 2 = 84 km/h * 0.25 h = 21 km

Therefore, at 12:15, Train 1 will be 18 kilometers away from the railway station in one direction, and Train 2 will be 21 kilometers away from the railway station in the opposite direction.

So, the distance between the two trains at 12:15 will be 18 + 21 = 39 kilometers.

Please note that these calculations assume a constant speed for the entire duration of the journey and do not take into account any stops or changes in speed that may occur during the trip.