Question

Две бригады строили дорогу.Одна бригада построила 5/7 дороги,а другая-остальную чать .Во сколько раз часть дороги,построенная первой бригадой,больше,чем её часть,построенная второй бригадой. скажите как решать умаляю !!!!!!!!!!!! это из административной контрошине сдам на 5 получу 4 в четверти !

Answer 1

Вся дорога 1, значит 2 бригада построила 1-5/7=2/7, 5/7 разделить на 2/7 =  в 2,5 раза

Answer 2

Вся дорого - 1. 5/7 сделала первая бригада следовательно 2/7 вторая. 5/7 делить на 2/7 получится 5/2 то есть 2.5 раза. Ответ 2.5

Answer 3

Problem Analysis

Two brigades are building a road. One brigade has built 5/7 of the road, while the other brigade has built the remaining part. The task is to determine the ratio by which the part of the road built by the first brigade is greater than the part built by the second brigade.

Solution

To solve this problem, we need to compare the lengths of the two parts of the road built by each brigade. Let's denote the length of the road built by the first brigade as `x` and the length of the road built by the second brigade as `y`. We know that the first brigade has built 5/7 of the road, so we can set up the equation:

x = (5/7) * (x + y)

Simplifying this equation, we can solve for `y`:

x = (5/7) * x + (5/7) * y

x - (5/7) * x = (5/7) * y

(2/7) * x = (5/7) * y

y = (7/5) * (2/7) * x

y = (2/5) * x

Therefore, the length of the road built by the second brigade is 2/5 of the length of the road built by the first brigade. In other words, the part of the road built by the first brigade is 2.5 times greater than the part built by the second brigade.

Conclusion

The part of the road built by the first brigade is 2.5 times greater than the part built by the second brigade.

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