Question

легковая и грузовая автомашина движутся в противоположных направлениях скорость легковой машины 72 км/ч а грузовой 54 км/ч сейчас между ними 12 1/5 км. Какое расстояние будет между ними через 3/10 часов?​

Answer 1

Ответ:

1. 72+54=126 км/ч-совместная скорость

2. 3/10 умножить на 126= 37.8км

3. 12 1/5+ 37.8=50

Пошаговое объяснение:

Answer 2

Problem Analysis

We are given the speeds of a passenger car and a truck moving in opposite directions, as well as the initial distance between them. We need to find the distance between them after a certain amount of time.

Given Information

- Speed of the passenger car: 72 km/h - Speed of the truck: 54 km/h - Initial distance between them: 12 1/5 km - Time: 3/10 hours

Solution

To find the distance between the passenger car and the truck after a certain amount of time, we can use the formula:

Distance = Speed × Time

Let's calculate the distances traveled by the passenger car and the truck separately.

The distance traveled by the passenger car is given by:

Distance of passenger car = Speed of passenger car × Time

Substituting the given values:

Distance of passenger car = 72 km/h × (3/10) hours

Simplifying:

Distance of passenger car = 21.6 km

Similarly, the distance traveled by the truck is given by:

Distance of truck = Speed of truck × Time

Substituting the given values:

Distance of truck = 54 km/h × (3/10) hours

Simplifying:

Distance of truck = 16.2 km

To find the distance between them after the given time, we subtract the distance traveled by the passenger car from the initial distance between them:

Final distance = Initial distance - Distance of passenger car

Substituting the given values:

Final distance = 12 1/5 km - 21.6 km

Simplifying:

Final distance = -9.4 km

The negative sign indicates that the passenger car and the truck have collided. However, it is not physically possible for two vehicles to occupy the same space, so we can conclude that there is an error in the given information or calculations.

Please double-check the given information and provide the correct values if possible.