Question

Тракторист зорав 5/7 поля,площа якого 140 га.Яка площа зоряної ділянки?​

Answer 1

Пошаговое объяснение:

140га-1 ціла

х га -5/7

х=140*5/7=100га площя зораної ділянки

Answer 2

Ответ:

Пошаговое объяснение:

140га- 1 ціла

х га  - 5/7

х= 140 * 5/7= 100 га площа зораної ділянки

Answer 3

Calculating the Area of the Star-Shaped Plot

To calculate the area of the star-shaped plot, we can use the formula for the area of a regular heptagon (a seven-sided polygon) and subtract the area of the circular regions at the corners.

Step 1: Calculate the Area of the Heptagon The formula for the area of a regular heptagon is: \[ A = \frac{7}{4} \times s^2 \times \cot\left(\frac{\pi}{7}\right) \] where \( s \) is the side length of the heptagon.

Step 2: Calculate the Area of the Circular Regions The circular regions at the corners can be calculated using the formula for the area of a circle: \[ A = \pi \times r^2 \] where \( r \) is the radius of the circle.

Step 3: Subtract the Area of the Circular Regions from the Heptagon Subtract the total area of the circular regions from the area of the heptagon to find the area of the star-shaped plot.

Let's calculate the area of the star-shaped plot using the given information.

Calculation

Given: - The tractor plows 5/7 of the field, which has an area of 140 hectares.

Step 1: Calculate the Area Plowed by the Tractor \[ \text{Area plowed} = \frac{5}{7} \times 140 \] \[ \text{Area plowed} = 100 \text{ hectares} \]

Now, we can proceed to calculate the area of the star-shaped plot.