Question

Поможете решить?В составе товарного поезда было 42 вагона. Крытых вагонов было в 1, 2 раза больше, чем платформ, а число цистерн составляло 3/5 числа платформ.Сколько вагонов каждого вида было в составе поезда?

Answer 1

1,2х+3/5
х+х=422,
8х=42х=42:2,8
х=15-платформ. 


1,2*15=18-крытых вагонов.
15*3:5=9-цистерн. 

или

х+1,2х+3/5
х=42х+1,2х+0,6х=42
2,8х=42
х=42:2,8
х=15 платформ

15*1,2=18 крытых вагонов
15*0,6=9 цистерн

Answer 2

Problem Analysis

We are given the composition of a freight train consisting of 42 wagons. The number of covered wagons is 1 or 2 times greater than the number of platforms, and the number of tank wagons is 3/5 of the number of platforms. We need to determine the number of wagons of each type in the train.

Solution

Let's assume the number of platforms is x.

According to the given information: - The number of covered wagons is 1 or 2 times greater than the number of platforms. This means the number of covered wagons is either x or 2x. - The number of tank wagons is 3/5 of the number of platforms. This means the number of tank wagons is (3/5)x.

We can set up the following equation to represent the total number of wagons in the train: x + (x or 2x) + (3/5)x = 42

Simplifying the equation: x + x + (3/5)x = 42 (11/5)x = 42 x = (5/11) * 42 x = 210/11 x ≈ 19.09

Since the number of platforms cannot be a decimal, we can round it to the nearest whole number. Therefore, the number of platforms is approximately 19.

Now, we can calculate the number of covered wagons and tank wagons: - Number of covered wagons = 1 or 2 times the number of platforms = 1 or 2 * 19 = 19 or 38 - Number of tank wagons = 3/5 of the number of platforms = (3/5) * 19 ≈ 11.4 ≈ 11

Therefore, in the train, there are approximately 19 platforms, 19 or 38 covered wagons, and 11 tank wagons.

Answer

In the composition of the train, there are approximately: - 19 platforms - 19 or 38 covered wagons - 11 tank wagons