If the ratio of length to width of a rectangle is 5:3, and the ratio of length to width is 12 cm, what is the area of the rectangle

If the ratio of length to width of a rectangle is 5:3, and the ratio of length to width is 12 cm, what is the area of the rectangle

Length = 5 × 12 ÷ (5-3) = 30 cm
Width = 3 × 12 ÷ (5-3) = 18 cm
The area of this rectangle is 30 × 18 = 540 square centimeters

The perimeter of a rectangle is 18 cm, and the ratio of length to width is 2:1. What is the area of the rectangle?

L + W = 18 △ 2 = 9cm
Width = 9 (2 + 1) = 3cm
Length = 9-3 = 6cm
Area = 3 × 6 = 18 square centimeter

The length of a rectangle is 18 cm, and the ratio of length to width is 4:3. What is the area of this rectangle?

Width: 18 △ 4 / 3 = 13.5cm
Area: 18 × 13.5 = 243 square centimeters
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Cut a rectangle 24 cm long and 18 cm wide into two identical rectangles. What is the area of each small rectangle and what is the longest circumference of each small rectangle

24 * 18 / 2 = 216 square centimeters, the longest perimeter is 24 + 9 + 24 + 9 = 66 cm

It is known that the area of the rectangle is 6mxm + 60m + 150, and the ratio of length to width is 3:2. Find the perimeter of the rectangle

If the length is 3a, the width is 2a, the area is 6axa and the perimeter is 10A
6aXa=6MxM+60M+150
From this, we can calculate AXA = MXM + 10m + 25 = (M + 5) x (M + 5) and get a = m + 5
So perimeter 10A = 10m + 50

The length of one side of the rectangle is 3A + 3b, and the length of the other side is one less than twice its length. Find the circumference of the rectangle

The length of the first side is L1 = 3A + 3B
The length of the other side is L2 = 2 (3a + 3b) - 1
The perimeter is L = 2 (L1 + L2) = 2 {(3a + 3b) + [2 (3a + 3b) - 1]}
After finishing, l = 18a + 18b-2

It is known that one side of a rectangle is 5A + 2B, and the other side is a-3b smaller than it. Find the perimeter of the rectangle

Perimeter = 2 × (5a + 2B + 5A + 2b-a + 3b)
=2×(9a+10b);
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The perimeter of a rectangle is 36 meters. How many square meters is its largest area?

If the perimeter is fixed, the square has the largest area when the four sides of the rectangle are equal, that is, the square has the largest area, and the length of each side is 9 meters. The answer is 81 square meters. If the shape is not limited, the circle has the largest area when the perimeter is fixed. It can be inferred that when the perimeter of the circle is 2, r = 36 / 2, r = 5.73, the area is 103.1 square meters

A rectangle can be divided into six squares with side length of 3 / 4 decimeter. Calculate the perimeter and area of the rectangle

The width is 3 / 4 × 2 = 3 / 2 decimeter
The length is 3 / 4 × 3 = 9 / 4 decimeter
S = 3 / 2 × 9 / 4 = 27 / 8 square decimeter
Perimeter = 3 / 2 × 2 + 9 / 4 × 2 = 7.5 decimeters

The two sides are 2 decimeters square into a rectangle, the circumference of the rectangle is () decimeters
A. 8B. 12C. 16D. 24

The length of the rectangle is 2 × 2 = 4 (decimeter), the width is 2 decimeter, so the perimeter is: (4 + 2) × 2 = 6 × 2 = 12 (decimeter). Answer: the perimeter of the rectangle is 12 decimeter