Question

поезд со скоростью 80 км в час проходит расстояние между двух городов за 12 часов. за какое время пройдёт это расстояние автомобиль если его скорость на 20 км в час меньше скорости поезда

Answer 1

Ответ:

(80*12):60=16.

ответ 16 часов

Answer 2

Problem Analysis

We are given that a train travels a distance between two cities at a speed of 80 km/h and takes 12 hours to complete the journey. We need to find the time it would take for a car to cover the same distance if its speed is 20 km/h less than the speed of the train.

Solution

To find the time it would take for the car to cover the distance, we can use the formula:

Time = Distance / Speed

Let's calculate the time it would take for the car to cover the distance.

Calculation

Given: - Speed of the train = 80 km/h - Time taken by the train = 12 hours - Speed of the car = Speed of the train - 20 km/h

To find the distance, we can use the formula:

Distance = Speed * Time

Substituting the values:

Distance = 80 km/h * 12 hours

Simplifying:

Distance = 960 km

Now, let's calculate the time it would take for the car to cover the distance.

Time = Distance / Speed of the car

Substituting the values:

Time = 960 km / (80 km/h - 20 km/h)

Simplifying:

Time = 960 km / 60 km/h

Time = 16 hours

Therefore, it would take the car 16 hours to cover the distance.

Answer

The car would take 16 hours to cover the distance between the two cities.