Question

Периметр прямоугольного газона 136 метров . Ширина 28 метров . Фермер половину газона заснял травой . Сколько семян травы ему понадобилось , если известно ,что на 1 метр квадратный расходуется 30 граммов семян

Answer 1

136 -( 28 * 2 ) = 80 м. - две длины
80 : 2 = 40 м. - длина газона
S = 28 * 40 =1120 кв.м. - площадь газона
1120 : 2 = 560 кв.м. - площадь половины газона
30 * 560 = 16800 г семян травы потребуется для засева половины площади газона.

Answer 2

Calculation of Grass Seeds Required

To calculate the number of grass seeds required by the farmer to cover half of the rectangular lawn, we need to determine the area of the lawn and then calculate the amount of grass seeds needed based on the given seed consumption rate.

Given information: - Perimeter of the rectangular lawn: 136 meters - Width of the lawn: 28 meters

Calculating the Length of the Lawn

To find the length of the lawn, we can use the formula for the perimeter of a rectangle:

Perimeter = 2 * (Length + Width)

Since we know the perimeter and the width, we can rearrange the formula to solve for the length:

Length = (Perimeter - 2 * Width) / 2

Substituting the given values into the formula:

Length = (136 - 2 * 28) / 2 = 80 / 2 = 40 meters

Calculating the Area of the Lawn

The area of a rectangle is given by the formula:

Area = Length * Width

Substituting the values we calculated:

Area = 40 * 28 = 1120 square meters

Calculating the Amount of Grass Seeds Required

The given seed consumption rate is 30 grams per square meter. To find the total amount of grass seeds required, we multiply the seed consumption rate by the area of the lawn:

Total seeds required = Seed consumption rate * Area

Substituting the values:

Total seeds required = 30 grams/square meter * 1120 square meters = 33,600 grams

Therefore, the farmer would need 33,600 grams (or 33.6 kilograms) of grass seeds to cover half of the rectangular lawn.

Please note that the above calculation assumes that the grass seeds are evenly spread across the lawn and that there is no wastage or loss during the seeding process.