Question

Когда автомобиль проехал 0,2 ,а затем еще 0,15 всего пути,то оказалось,что он проехал на 18 км меньше половины пути,который требовалось проехать.Сколько км должен был проехать автомобиль?

Answer 1

Переведём в целые проценты части пути 0,2 = 20% и 0,15=15%
Проехал всего 35% = 20+15 не забываем что от половины всего пути.
Так-же сказано, что от половины пути он проехал на 18 км меньше, значит учитывать надо не 100% пути,
а 50% и получается, что 35% он проехал от 50%
50-35=15% и этот те самые 18 километров.
18км : 15% = 1,2 так узнали что 1% =1,2км
Теперь всё просто.. ))
1,2 х 50 = 60 км - половина пути
60 х 2 = 120 км - весь путь

Answer 2

Problem Analysis

We are given that a car has traveled a distance of 0.2 km and then an additional distance of 0.15 km. At this point, it is found that the car has traveled 18 km less than half of the total distance it was supposed to travel. We need to determine the total distance the car was supposed to travel.

Solution

Let's assume the total distance the car was supposed to travel is D km.

According to the given information, the car has traveled a distance of 0.2 km and then an additional distance of 0.15 km. So, the total distance traveled by the car is:

0.2 km + 0.15 km = 0.35 km

We are also given that at this point, the car has traveled 18 km less than half of the total distance it was supposed to travel. Mathematically, this can be represented as:

(1/2)D - 18 km = 0.35 km

To find the value of D, we can solve this equation.

Adding 18 km to both sides of the equation, we get:

(1/2)D = 0.35 km + 18 km

Simplifying the right side of the equation, we have:

(1/2)D = 18.35 km

Multiplying both sides of the equation by 2, we get:

D = 2 * 18.35 km

Calculating the value, we find:

D = 36.7 km

Therefore, the car was supposed to travel a total distance of 36.7 km.

Answer

The car was supposed to travel a total distance of 36.7 km.