Question

за первый час было расчищено от снега 5\17 всей дороги, а за второй час -9/17 всей дороги.Какая часть дороги была расчищена от снега за эти два часа? на какую часть дороги было расчищено меньше в первый час чем во второй?

Answer 1

1) 5/17+9/17=14/17 - часть дороги, которая была расчищена от снега за 2 часа

2) 9/17-5/17=4/17 - на 4 части было расчищено меньше в первый час

Answer 2

Calculation of Snow-Cleared Road Sections

To determine the fraction of the road that was cleared of snow in the first two hours and the difference in the snow-cleared sections between the first and second hours, we need to calculate the individual snow-cleared sections for each hour.

Let's denote the length of the entire road as R.

In the first hour, 5/17 of the road was cleared of snow. This can be represented as (5/17)R.

In the second hour, 9/17 of the road was cleared of snow. This can be represented as (9/17)R.

Fraction of Road Cleared in Two Hours

To find the fraction of the road that was cleared of snow in the first two hours, we need to add the snow-cleared sections from the first and second hours.

The total snow-cleared section in the first two hours is (5/17)R + (9/17)R.

Simplifying the expression, we get (14/17)R.

Therefore, 14/17 of the road was cleared of snow in the first two hours.

Difference in Snow-Cleared Sections

To find the difference in the snow-cleared sections between the first and second hours, we subtract the snow-cleared section in the first hour from the snow-cleared section in the second hour.

The difference is (9/17)R - (5/17)R.

Simplifying the expression, we get (4/17)R.

Therefore, 4/17 of the road was cleared of snow less in the first hour compared to the second hour.

In summary: - 14/17 of the road was cleared of snow in the first two hours. - 4/17 of the road was cleared of snow less in the first hour compared to the second hour.

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