Предмет: Математика, автор: angelinaborisovskaa9

5. Чтобы огородить участок земли проволокой, взяли четыре куска проволоки длиной 65 м 60 см, 58 м 30 см. 71 м, 68 м 70 см. Этой проволоки хватило как раз на огораживание участка 4 раза. Чему равна длина ограды? б Плина одного бревна 8 м, а другого на 5 дм меньше. За 1 мин рабочие распиливают по 1 м.
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Ответы

Автор ответа: torhovmax

Ответ:

6560+5830+6870=19260

19260÷4=4815см=48м 15см

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The track is one of the basic features of a railway. It is also called the permanent way. The fact is that in the early days of railroad building the workers first had to lay temporary tracks to transport the materials to the construction site.
And only after that they laid down the permanent tracks on the permanent way, as it was called. The permanent way consists of rails, ties and ballast.
The railroad track of today is quite different from that used in the early days of railways.
The first tracks had no ballast, the rails were made of wood and rested on heavy blocks of granite. Then the wooden rails were replaced by iron ones, and the granite blocks were replaced by wooden ties.
This kind of track, however, was not strong enough for heavy steam trains.
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