Question

Школьники посадили сад, длина которого 40 м, а ширина на 10 м меньше. Чему равна площадь этого сада? Изгородью какой длины надо обнести этот сад?

Answer 1

Calculation of the Garden's Area

To calculate the area of the garden, we need to know the length and width of the garden. According to the information provided, the length of the garden is 40 meters, and the width is 10 meters less than the length.

Let's calculate the width of the garden first. Since the width is 10 meters less than the length, we can subtract 10 from the length to find the width:

Width = Length - 10 = 40 - 10 = 30 meters

Now that we have the length and width of the garden, we can calculate the area using the formula:

Area = Length * Width

Substituting the values we have:

Area = 40 meters * 30 meters = 1200 square meters

Therefore, the area of the garden is 1200 square meters.

Calculation of the Length of the Fence

To calculate the length of the fence required to enclose the garden, we need to know the perimeter of the garden. The perimeter is the sum of all the sides of the garden.

Since the garden is rectangular, the perimeter can be calculated using the formula:

Perimeter = 2 * (Length + Width)

Substituting the values we have:

Perimeter = 2 * (40 meters + 30 meters) = 2 * 70 meters = 140 meters

Therefore, the length of the fence required to enclose the garden is 140 meters.

Please let me know if there's anything else I can help you with!