Question

Расстояние между 2 городами 75 км .Треть этого расстояния поезд прошёл за 25 мин . С какой скоростью двигался поезд ? Реши задачу выражением .

Answer 1

1)75:3=25(км)
2)25:25=1(км/мин)
3)1×60=60(км/час)
Выражение: 75:3:25×60=60

Answer 2

Problem Analysis

We are given that the distance between two cities is 75 km. The train has traveled one-third of this distance in 25 minutes. We need to find the speed at which the train was moving.

Solution

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

Speed = Distance / Time

Let's calculate the speed using this formula.

Calculation

Given: - Distance = 75 km - Time = 25 minutes

We need to find the speed.

Using the formula, we have:

Speed = Distance / Time

Substituting the given values:

Speed = 75 km / 25 minutes

Converting minutes to hours (since speed is usually measured in km/h):

Speed = 75 km / (25 minutes * (1 hour / 60 minutes))

Simplifying:

Speed = 75 km / (25/60) hours

Speed = 75 km / (5/12) hours

Dividing by a fraction is the same as multiplying by its reciprocal:

Speed = 75 km * (12/5) hours

Simplifying:

Speed = 900 km / 5 hours

Speed = 180 km/h

Therefore, the train was moving at a speed of 180 km/h.

Answer

The train was moving at a speed of 180 km/h.