A circular flower bed with a diameter of 5 meters is known. A 1 meter wide path is paved around it. How many square meters is the area of the path?

A circular flower bed with a diameter of 5 meters is known. A 1 meter wide path is paved around it. How many square meters is the area of the path?

Garden radius r = 5 / 2 = 2.5m
The outer radius of the road is r = 2.5 + 1 = 3.5m
Area = π R ^ 2 - π R ^ 2 = 3.14 × 3.5 ^ 2-3.14 × 2.5 ^ 2 = 18.84 square meters

Build a 2-meter-wide path outside a circular flower garden with a diameter of 8 meters. How big is the path?

The radius of flower bed: 8 △ 2 = 4 (m), 3.14 × (4 + 2) 2-3.14 × 42, = 3.14 × 36-3.14 × 16, = 113.04-50.25, = 62.8 (M2); a: the area of this path is 62.8 m2

A rectangular flower garden is 12 meters long and 8 meters wide. A 1 meter wide path should be paved around it. How many square meters is the area of this path? (draw a picture first,

2（1*8+1*12）+4（1*1）=44

A rectangular flower garden is 12 meters long and 8 meters wide (as shown in the picture). To pave a 1 meter wide path around it, how many square meters is the area of this path? Draw a picture first, then answer

The circle is as follows: length: 12 + 1 + 1 = 14 (meters), width: 8 + 1 + 1 = 10 (meters), area: 14 × 10-12 × 8, = 140-96, = 44 (square meters); answer: the area of this path is 44 square meters

As shown in the picture, a one meter wide path is paved around a 20 meter long and 15 meter wide rectangular flower bed. (1) how many square meters is the area of the flower bed? (2) How many square meters is the area of the path?

(1) 20 × 15 = 300 (square meters), (2) (20 + 1 + 1) × (15 + 1 + 1) - 20 × 15, = 22 × 17-300, = 374-300, = 74 (square meters); answer: the area of flower bed is 300 square meters, the area of path is 74 square meters

A rectangular flower garden is 15 meters long and 15 meters wide. Build a 1-meter path around it. What is the area of the path,

If a one meter road is built around, it can be considered that the length and width of the inner rectangle are increased by two to form a new rectangle,
New rectangle area - inner rectangle area = Lane area
(15 + 2) * (15 + 2) - 15 * 15 = 64 square meters

A rectangular flower garden is 15 meters long and 10 meters wide. A 1 meter wide path should be paved around it. How many square meters is the area of this path?

Wait five minutes for me to calculate

Build a 1-meter-wide path beside a circular flower garden with a circumference of 31.4. How many square meters is the area of the path?

Build a 1-meter-wide path beside a circular flower garden with a perimeter of 31.4 meters. How many square meters is the area of the path?
Inner radius 31.4 △ 3.14 △ 2 = 5m
Outer radius 5 + 1 = 6M
Area 3.14 × (6 × 6-5 × 5) = 3.14 × 11 = 34.54 square meters

The street garden is a circle with a radius of 20 meters. There is a 2-meter-wide path around the garden. Please find the area of the path

3.14 * (20 + 2) ^ 2-3.14 * 20 ^ 2 = 3.14 * (484-400) = 3.14 * 84 = 263.76 square meters

There is a circular Street garden with a radius of 20 meters. There is a 2 meter wide path around the garden. The ball path covers a large area

The road covers an area of 3.14 × (20 + 2) &# 178; - 3.14 × 20 &# 178; = 263.76 square meters