The lawn in the park is a rectangle, 43.5 meters in width and 1.5 times in length. What are the perimeter and area of this rectangle?

The lawn in the park is a rectangle, 43.5 meters in width and 1.5 times in length. What are the perimeter and area of this rectangle?

Perimeter: 43.5 × 2 + 43.5 × 1.5 × 2 = 217.5m area: 43.5 × 43.5 × 1.5 = 2651.375 M2

The ratio of length to width of a rectangular garden is 5:3. It is known that the ratio of length to width is 120m more. How many square meters is the area of this garden?

Let the length of the rectangle be 5x meters and the width be 3x meters. According to the meaning of the question, we can get the equation: 5x-3x = 120, & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; 2x = 120, & nbsp; & nbsp; & nbsp; & nbsp; X = 60, so the length is 60 × 5 = 300 meters, the width is 60 × 3 = 180 meters, and 300 × 180 = 54000 square meters

A rectangular green space, 200 square meters long, 5 meters wide, and then increased by 10 meters

I don't know if your topic is to increase the width by 10 meters or increase the length and width by 10 meters! If you increase the width by 10, multiply by 10! Otherwise, increase the width by 10

The area of a rectangular green space is 810 square meters. If its length is unchanged and its width is doubled, how many square meters is its area?

Let length x width y, then xy = 810, and new area Z, then z = x * 2Y = 2 * 810 = 1620 square meters

The area of a rectangular grassland is 480 square meters. Now its width will be increased to 18 meters, and its length will not change. So how many square meters is the expanded grassland area?
(this question has few conditions) --- Chi Ronghao, class 10, grade 4, Jingwei primary school

Children today
I said I was speechless
Don't answer the questions downstairs
The answer you give is to teach the next generation badly

If the length of a rectangle is increased by 5 meters, the area will be increased by 20 square meters. If the width is increased by 5 meters, the area will be increased by 30 square meters

Width = 20 △ 5 = 4m;
Length = 30 △ 5 = 6m;
Area = 4 × 6 = 24 square meters;
If you don't understand this question, you can ask,

If the length of a rectangular test field is increased by 8 meters or the width by 5 meters, the area will be increased by 1400 square meters. What is the area of the original rectangular test field

Original
Length = 1400 △ 5 = 280m
Width = 1400 △ 8 = 175m
Area = 280 × 175 = 49000 square meters

If the length of a rectangle is increased by 5 meters or the width by 1.2 meters, its area will be increased by 12 square meters. How many square meters is the original area of the rectangle?
Another question: the school has bought 90 books, of which story books are twice as many as literature and art books, and science and technology books are one less than half of literature and art books. How many of these three books do you buy?

1. Width: 12 △ 5 = 2.4
Length: 12 △ 1.2 = 10
Original area: 10x2.4 = 24 (square centimeter)
2. Literature and art books: (90 + 1) / (2 + 1 + 1 / 2) = 26
Storybook: 26x2 = 52
Science and technology book: 26 △ 2-1 = 12

One is a meter long and B meter wide. The length of the rectangle increases by 5 meters, and the area increases by () square meters, the width increases by 5 meters, and the area increases by ()

One is a meter long and B meter wide. The length of the rectangle increases by 5 meters and the area increases by (5b) square meters. The width increases by 5 meters and the area increases by (5a)

If the length of a rectangle is increased by 5 meters or the width by 1.2 meters, its area will be increased by 12 square meters. What is the original area of the rectangle?

12 △ 5 = 2.4m, so the width of the rectangle is 2.4m
12 △ 1.2 = 10m, so the rectangle is 10m long
2.4 × 10 = 24 square meters
A: the area of this rectangle is 24 square meters