Question

Веревку розрезали на 5 частей.Перва часть больше второй на 4,2м,но меньше третьей на 2,3.Четвертая часть больше чем пятая на 3,7,но меньше третьей на 1,3.Какая длинна веревки,если длинна четвёртой части 7,8 и??

Answer 1

1 часть -6.8м (9.1-2.3)
2 часть-2.6м (6.8-4.2)
3часть -9.1м (7.8+1.3)
4 часть -7.8м
5 часть-4.1м (7.8-3.7)
вся длина веревки 30.4м.

Answer 2

Solution:

Let's solve this step by step.

1. Let's denote the lengths of the five parts of the rope as follows: - First part: x meters - Second part: (x - 4.2) meters - Third part: (x - 2.3) meters - Fourth part: (x - 2.3 + 3.7) meters - Fifth part: (x - 2.3 + 3.7 - 1.3) meters

2. We are given that the length of the fourth part is 7.8 meters. Using this information, we can set up the equation: - (x - 2.3 + 3.7) = 7.8

3. Solving for x: - x = 7.8 - 3.7 + 2.3

4. Now, we can calculate the value of x.

Calculation:

- x = 7.8 - 3.7 + 2.3 - x = 6.8

So, the length of the rope is 6.8 meters.

This calculation is based on the given information and the equation derived from it.