Question

Реши задачу. Длина одной улицы 1200 м. Когда вторую улицу продолжили на 200 м, то длина её стала вдвое больше, чем длина первой улицы. Какова была длина второй улицы первоначально? На сколько теперь вторая улица длиннее первой? (краткую запись можно не писать)

Answer 1

1)1200×2=2400-2 ул. во второй раз
2)2400-200=2200-2 ул. первоначально
3)2200-1200=1000
Ответ:на 1000м. вторая улица длиннее первого

Answer 2

1) 1200*2=2400(м)-длина второй улицы после ее продления
2)2400-200=2200(м)-длина второй улицы  первоначально
3)2400-1200=1200(м)- вторая улица длинее первой

Answer 3

Problem Analysis

We are given that the length of one street is 1200 meters. When the second street was extended by 200 meters, its length became twice the length of the first street. We need to find the original length of the second street and determine how much longer it is compared to the first street.

Solution

Let's assume the original length of the second street is x meters.

According to the problem, when the second street was extended by 200 meters, its length became twice the length of the first street. This can be expressed as:

x + 200 = 2 * 1200

Simplifying the equation:

x + 200 = 2400

x = 2400 - 200

x = 2200

Therefore, the original length of the second street was 2200 meters.

To find out how much longer the second street is compared to the first street, we subtract the length of the first street from the length of the second street:

2200 - 1200 = 1000

Therefore, the second street is 1000 meters longer than the first street.

Answer

The original length of the second street was 2200 meters. The second street is now 1000 meters longer than the first street.