Question

6 Реши задачи. а Для озеленения площадок космодрома использова 72 кг семян. Площадь одной площадки - 220 м², а второй - 380 м². Сколько граммов семян использовали для каждой площадки, если на каждый квадратный метр расходова равное количество семян?​

Answer 1

A) 72 кг = 72 000 г
1) 220 ÷ 380 = 600 (м2) - общая площадь участков;
2) 72 000 : 600 = 120 (г) - использовали семян на 1
M?;
3) 120 • 220 = 26400 (r) = 26 кг 400 г - использовали на 1-й площадке;
4) 120 • 380 = 45600 (г) = 45 кг 600 г - использовали на 2-й площадке.
б) Участок имеет форму прямоугольника.
_Периметр прямоугольника находят по формуле
P=2(a + b),
где Р - периметр, а и b - длины сторон прямоугольника.
Площадь прямоугольника находят по формуле
S= ab,
где S - площадь, а и b - длины сторон прямоугольника.
1) 1251: 3 = 417 (м) - ширина участка;
2) P = 2(1251 + 417) = 2 • 1668 = 3336 (м) - периметр участка;
3) S = 1251 - 417 = 521667 (м2) - площадь участка.

Answer 2

Problem Analysis

We are given that 72 kg of seeds were used for greening two areas of a cosmodrome. The first area has an area of 220 m², and the second area has an area of 380 m². We need to find the amount of seeds used for each area, assuming an equal amount of seeds is used per square meter.

Calculation

To find the amount of seeds used for each area, we need to divide the total amount of seeds by the total area of each respective area.

For the first area: - Total seeds used = 72 kg - Area of the first area = 220 m²

To find the amount of seeds used per square meter, we divide the total seeds used by the area of the first area: - Seeds used per square meter for the first area = 72 kg / 220 m²

For the second area: - Total seeds used = 72 kg - Area of the second area = 380 m²

To find the amount of seeds used per square meter, we divide the total seeds used by the area of the second area: - Seeds used per square meter for the second area = 72 kg / 380 m²

Calculation Results

Using the given information, we can calculate the amount of seeds used for each area:

For the first area: - Seeds used per square meter for the first area = 72 kg / 220 m² = 0.327 kg/m²

For the second area: - Seeds used per square meter for the second area = 72 kg / 380 m² = 0.189 kg/m²

Answer

Therefore, for the first area with an area of 220 m², approximately 0.327 kg (or 327 grams) of seeds were used. And for the second area with an area of 380 m², approximately 0.189 kg (or 189 grams) of seeds were used.

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