Question

Грузовик проехал в первый день треть всего пути, во второй день - 90% пути, пройденного в первый день, а за третий день остальные 440 км. Сколько километров проехал грузовик за второй день?

Answer 1

Пусть х весь путь, тогда :
1 день х1/3
2 день х1/3*9/10=х3/10
3 день 440
Составим уравнение:
х=х1/3+х3/10+440
х=х19/30+440
х11/30=440
х=440*30/11=120 (весь путь)
120*3/10=12*3=36 км второй день.
Ответ:грузовик проехал за второй день 36 км.

Answer 2

Calculation of the Distance Traveled by the Truck on the Second Day

To calculate the distance traveled by the truck on the second day, we need to determine the total distance the truck traveled on the first day and the remaining distance on the third day.

According to the given information: - The truck traveled one-third of the total distance on the first day. - On the second day, it traveled 90% of the distance covered on the first day. - On the third day, it traveled the remaining 440 km.

Let's assume the total distance traveled by the truck is represented by D.

On the first day, the truck traveled one-third of the total distance, which can be calculated as:

Distance on the first day = (1/3) * D On the second day, the truck traveled 90% of the distance covered on the first day. Therefore, the distance traveled on the second day can be calculated as:

Distance on the second day = 0.9 * (1/3) * D On the third day, the truck traveled the remaining distance, which is given as 440 km. Therefore, we can set up the equation:

Distance on the first day + Distance on the second day + 440 = D

Now, let's solve for the distance traveled on the second day.

Distance on the second day = D - Distance on the first day - 440

Substituting the values we calculated earlier:

Distance on the second day = D - (1/3) * D - 440

Simplifying the equation:

Distance on the second day = (2/3) * D - 440

Therefore, the truck traveled (2/3) * D - 440 kilometers on the second day.

Please note that we do not have the specific value of the total distance traveled by the truck, so we cannot provide an exact numerical answer. However, the calculation provided above represents the general formula to determine the distance traveled on the second day based on the given information.