Question

Швидкість рівномірного руху поїзда між двома містами дорівнює 80 км/год, а середня швидкість на всьому шляху – 60 км/год. Усі зупинки займають 1 год. Обчисліть час руху поїзда та відстань між цими містами.( плииииззз решитеее даю 100б.) за неправильну чи не коректну відбовідь бан!!!!!!!!!!!​

Answer 1

Ответ:

Пусть время в пути - х,

Время, когда поезд двигался - (Х - 1)

х часов поезд двигался с средней скоростью 60 км/час - > S = 60x

(х - 1) часов он двигался со скоростью 80 км/час - > S = 80(x - 1)

Составляем уравнение, где S = S, то есть: 60x = 80(x - 1), решаем.

Получаем х = 4 км поезд был в пути и двигаясь эти 4 часа со средней скоростью 60 км/час преодолел 240 км.

Ответ : S = 240 км.

Answer 2

Calculation of Time and Distance for Train Journey

To calculate the time and distance for the train journey, we need to consider the speed of the train between the two cities and the average speed for the entire journey, as well as the time taken for all the stops.

Given: - Speed of the train between the two cities: 80 km/h - Average speed for the entire journey: 60 km/h - Time taken for all the stops: 1 hour

To calculate the time taken for the train journey, we can use the formula:

Time = Distance / Speed

Let's assume the distance between the two cities is represented by D.

The time taken for the train journey at a speed of 80 km/h can be calculated as:

Time1 = D / 80

The time taken for the train journey at an average speed of 60 km/h can be calculated as:

Time2 = D / 60

Since the time taken for all the stops is 1 hour, we can write the equation:

Time1 + 1 hour = Time2

Substituting the values, we get:

(D / 80) + 1 = D / 60

To solve this equation, we can multiply both sides by 80 * 60 to eliminate the denominators:

60D + 80 * 60 = 80D

Simplifying the equation, we get:

20D = 80 * 60

Solving for D, we find:

D = (80 * 60) / 20 = 240 km

Therefore, the distance between the two cities is 240 km.

To calculate the time taken for the train journey, we can substitute the value of D into either Time1 or Time2:

Time = D / Speed = 240 km / 80 km/h = 3 hours

Therefore, the time taken for the train journey is 3 hours.

In summary: - Distance between the two cities: 240 km - Time taken for the train journey: 3 hours

Please note that the above calculations are based on the given information and assumptions.