Question

10 Реши задачи с краткой записи а) Длина вновь построенной дороги - 126 км.29части дороги озеленили. Сколько кило-метров дороги осталось озеленить?6) Длина поля - 15 км, а ширина3длины.5Чему равна ширина поля? Найди периметри площадь поля.​

Answer 1

Ответ:

Периметр поля = 2 * (15 + 9) = 48 км

Площадь поля = 15 * 9 = 135 км²

Пошаговое объяснение:

а) Осталось озеленить 28 км дороги.

Длина озелененной дороги = 126 * 2/9 = 28 км

Длина незеленой дороги = 126 - 28 = 98 км

б) Ширина поля равна 9 км.

Длина поля = 15 км

Отношение длины к ширине поля = 15/х = 5/3

Отсюда получаем: х = 9 км

Answer 2

Ответ:

А)

1)126:9=14(км)-1 часть

2)14•2=28(км)-2 часть

3)126-28=98(км)-осталось озеленить

Ответ :98 км осталось озеленить.

Под Б на фотографии

Answer 3

Task 1: Length of Road to be Landscaped

To find out how many kilometers of road are left to be landscaped, we need to subtract the length of the landscaped portion from the total length of the road.

Given: - Total length of the road: 126 km - 2/9 of the road has been landscaped

To find the length of the road that has been landscaped, we can multiply the total length of the road by the fraction that represents the portion that has been landscaped:

Length of landscaped road = (2/9) * 126 km

To find the length of the road that is left to be landscaped, we can subtract the length of the landscaped road from the total length of the road:

Length of road left to be landscaped = Total length of the road - Length of landscaped road

Let's calculate it step by step:

1. Calculate the length of the landscaped road: Length of landscaped road = (2/9) * 126 km = 28 km [[1]]

2. Calculate the length of the road left to be landscaped: Length of road left to be landscaped = 126 km - 28 km = 98 km

Therefore, there are 98 kilometers of road left to be landscaped.

Task 2: Width of the Field and Perimeter/Area

To find the width of the field, we are given that the length of the field is 15 km and the width is 3 times the length.

Given: - Length of the field: 15 km - Width of the field: 3 times the length

To find the width of the field, we can multiply the length by 3:

Width of the field = 3 * 15 km

Let's calculate it:

Width of the field = 3 * 15 km = 45 km

Therefore, the width of the field is 45 kilometers.

To find the perimeter and area of the field, we can use the formulas:

Perimeter of a rectangle = 2 * (length + width) Area of a rectangle = length * width

Given: - Length of the field: 15 km - Width of the field: 45 km

Let's calculate the perimeter and area of the field:

Perimeter of the field = 2 * (15 km + 45 km) = 2 * 60 km = 120 km Area of the field = 15 km * 45 km = 675 km²

Therefore, the perimeter of the field is 120 kilometers and the area of the field is 675 square kilometers.

I hope this helps! Let me know if you have any further questions.