Question

Туристы на машине проехали со скоростью 53 3/4 за 4часа. Из всей дороги 4/5 асфальт, а остальное грейдер. нужно найти длину грейдерной дороги.

Answer 1

1. 53 3/4 умножаем на 4 и получаем 215 ( всё расстояние )
2.Грейдер составляет 1 - 4/5 = 1/5
3. 215 умножаем на 1/5 и получаем 43.
Ответ: 43

Answer 2

Problem Analysis

We are given that tourists traveled at a speed of 53 3/4 units for 4 hours. We also know that 4/5 of the road is asphalt, and the rest is a grader road. We need to find the length of the grader road.

Solution

To find the length of the grader road, we first need to find the total distance traveled by the tourists. We can then subtract the distance covered by the asphalt road to find the length of the grader road.

Let's calculate the total distance traveled by the tourists.

Calculation

The speed of the tourists is given as 53 3/4 units, and they traveled for 4 hours. To find the total distance, we can multiply the speed by the time:

Total distance = Speed * Time

Total distance = 53 3/4 * 4

To perform this calculation, we need to convert the mixed number (53 3/4) to an improper fraction.

53 3/4 = (4 * 53 + 3) / 4 = 215 / 4

Now we can calculate the total distance:

Total distance = (215 / 4) * 4

Total distance = 215

The total distance traveled by the tourists is 215 units.

Next, let's calculate the distance covered by the asphalt road.

Calculation

We are given that 4/5 of the road is asphalt. To find the distance covered by the asphalt road, we can multiply the total distance by 4/5:

Distance covered by asphalt road = Total distance * (4/5)

Distance covered by asphalt road = 215 * (4/5)

To perform this calculation, we can simplify the fraction:

Distance covered by asphalt road = 215 * 4/5

Distance covered by asphalt road = 172

The distance covered by the asphalt road is 172 units.

Finally, let's find the length of the grader road by subtracting the distance covered by the asphalt road from the total distance.

Calculation

Length of grader road = Total distance - Distance covered by asphalt road

Length of grader road = 215 - 172

Length of grader road = 43

The length of the grader road is 43 units.

Answer

The length of the grader road is 43 units.

Please let me know if there is anything else I can help you with.