The perimeter of a round flower bed is 15.7 meters, and a 0.4 meter wide circular runway is paved around it. What is the area of the path?

The perimeter of a round flower bed is 15.7 meters, and a 0.4 meter wide circular runway is paved around it. What is the area of the path?

Use big circle area - small circle area = circular runway area
Small circle diameter = 15.7 / 3.14 = 5m
Large circle area: 3.14 * (2.5 + 0.4) ^ 2 = 26.41
Area of small circle: 3.14 * 2.5 * 2.5 = 19.63
26.41-19.63=6.78

The perimeter of a circular flower bed is 50.24 meters, and there is a circular path 2 meters wide around the flower bed. How many square meters is the area of this path?

The perimeter of the flower bed is 50.24 m, so the radius is 50.24 △ 3.14 △ 2 = 8 (m)
There is a 2 meter wide path outside, so the outer edge of the path is a circle with a radius of 10 meters
Therefore, the area of the small road is 3.14 × (10 & # 178; - 8 & # 178;) = 113.04 (M2)

There is a circular flowerbed with a circumference of 18.86 meters. A 1 meter wide circular path is built around it. How many square meters is the area of this path?

Flower bed radius = 18.86 / (2 * 3.14) = 3
Flower bed area = 3.14 * 9 = 28.26
Total area of flower bed plus Road = 3.14 * 16 = 50.24
Road area = 21.98

The perimeter of a circular flower bed is 18.84 meters, and there is a circular path with a width of 2 meters around it. How many square meters is the area of the path?

The radius of flower bed: 18.84 △ 3.14 △ 2 = 3 (m) the area of path: 3.14 × (3 + 2) 2-3.14 × 32 = 3.14 × 25-3.14 × 9 = 3.14 × (25-9) = 3.14 × 16 = 50.24 (M2) a: the area of path is 50.24 m2

The perimeter of a round flower bed is 18.84 meters. Build a 1 meter wide path around it to find the area of the path

Flower bed radius = 18.84 △ 3.14 △ 2 = 3M
Path radius = 3 + 1 = 4m
Area = 4 × 4 × 3.14-3 × 3.14 = 21.98 square meters

A flower bed, diameter is 6 meters, around him there is a 1 meter wide circular path, the area of the path is how many square meters

3.14X(3+1)*-3.14x3*
=50.24-28.26
=21.98

A 10 m diameter fountain is surrounded by a circular road I, which is 3 m wide. What is the area of this road

If the diameter is 10 meters, then the radius is 5 meters
(5+3)×（5+3）×3.14 -5×5×3.14
=200.96 - 78.5
=122.46 (M2)

The diameter of a circular fountain is 8m, and a 1m wide path is paved around it. What is the area of this line?

[(8 / 2 + 1) - (8 / 2)] × 3.14 = [(4 + 1) - 4] × 3.14 = (5-16) × 3.14 = (25-16) × 3.14 = 9 × 3.14 = 28.26m, the area of this path is 28.26m2

There is a circular fountain with a perimeter of 28.26m, and a 1m wide path is laid beside the fountain. How many square meters is the area of this path?

The inner radius is: 28.26 △ 3.14 △ 2 = 4.5m
The outer radius is: 4.5 + 1 = 5.5m
The area of the ring is:
3.14×（5.5²-4.5²）
=3.14×（30.25-20.25）
=3.14×10
=31.4 square meters
That is, the area of the road is 31.4 square meters
Hope to help you!
If you don't understand, please ask. I wish you progress in your study!

A circular pool with a radius of 10m is surrounded by a 2m wide path. What is the area of this path in square meters?

Area of path = π * R ^ 2 - π * R ^ 2
=π * (144-100) = 138.23 M2