Question

Реши обратным способом :В купейных вагонах поезда едут 324 пассажира. Это в два раза больше, чем пассажиров в плацкартных вагонах. Всего 12 вагонов в поезде. Сколько мест в купейном вагоне, если в плацкартном вагоне 54 места?

Answer 1

324/2=162 пассажира в плацкартных вагонах
162/54=3 плацкартных вагона
12-3=9 купейных вагонов
324/9=36 мест в купейном вагоне

Answer 2

324*2=648  324:36=9      648:54=12  9+12=21 вагон

Answer 3

Problem Analysis

We are given that there are 324 passengers in the coupe cars of a train, which is twice the number of passengers in the platzkart cars. The train has a total of 12 cars. We need to determine the number of seats in the coupe cars, given that there are 54 seats in the platzkart cars.

Solution

Let's assume that the number of passengers in the platzkart cars is x. According to the problem, the number of passengers in the coupe cars is twice that of the platzkart cars. Therefore, the number of passengers in the coupe cars is 2x.

We are also given that the total number of passengers in the train is 324. Since there are 12 cars in the train, we can set up the following equation to represent the total number of passengers:

x + 2x = 324

Simplifying the equation, we get:

3x = 324

To find the value of x, we divide both sides of the equation by 3:

x = 324 / 3 x = 108

Therefore, there are 108 passengers in the platzkart cars.

Now, we need to determine the number of seats in the coupe cars. We are given that there are 54 seats in the platzkart cars. Since the number of passengers in the coupe cars is twice that of the platzkart cars, the number of seats in the coupe cars can be calculated as:

2 * 54 = 108

Therefore, there are 108 seats in the coupe cars.

Answer

There are 108 seats in the coupe cars if there are 54 seats in the platzkart cars.