Question

Задание 1 Реши задачу ,выполни чертеж Из одного населенного пункта одновременно выехали в одном направлении легковая машина со скоростью 70 км/час и грузовик со скорость 50 км/час. Через какое время расстояние между ними будет 80 км ? Пожалуйста ​

Answer 1

Ответ:

V¹=70км/час

V²=50км/час

S⁰=80км

t=?

t=S:V

V=V¹-V²=70-50=20км/час

t=80:20=4часа

ответ:через 4 часа их расстояние будет 80км.

Answer 2

70*50=3500
3500:80=43

Answer 3

Problem Analysis

We are given that a car and a truck start simultaneously from the same location and travel in the same direction. The car has a speed of 70 km/h, and the truck has a speed of 50 km/h. We need to determine the time it takes for the distance between them to be 80 km.

Solution

To solve this problem, we can use the formula: Distance = Speed × Time

Let's assume that the time it takes for the distance between the car and the truck to be 80 km is t hours.

The distance traveled by the car in t hours is given by: Distance traveled by car = Speed of car × t = 70t

The distance traveled by the truck in t hours is given by: Distance traveled by truck = Speed of truck × t = 50t

According to the problem, the distance between the car and the truck is 80 km. Therefore, we can set up the equation: Distance traveled by car - Distance traveled by truck = 80

Substituting the expressions for the distances traveled by the car and the truck, we get: 70t - 50t = 80

Simplifying the equation, we have: 20t = 80

Dividing both sides of the equation by 20, we find: t = 4

Therefore, it will take 4 hours for the distance between the car and the truck to be 80 km.

Answer

The time it takes for the distance between the car and the truck to be 80 km is 4 hours.