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A rectangular board is 24 decimeters long and 5 / 6 of its length wide. How many square decimeters is the area sawn off when sawing it into the largest circle?
Width 24 * 5 / 6 = 20 decimeters
The sawn area is 24 * 20-3.14 * (20 △ 2) & sup2; = 166 square decimeters
The area of a rectangular board is 0.36 square meters. What is its length and width?
As long as the product of length and width is 0.36, such as 0.4 and 0.9, 0.3 and 1.2
A rectangular board is 3 / 4 meters long and 4 / 9 of its width. How many square meters is its area?
Width = 3 / 4 × 4 / 9 = 1 / 3M
Area = 3 / 4 × 1 / 3 = 1 / 4 M2
There is a rectangular board, 9 / 5 in length and 5 / 3 in width. What is the perimeter and area of this board?
Perimeter: 2 * (length + width) = 2 * (9 / 5 + 5 / 3) = 104 / 15
Area: L * w = 9 / 5 * 5 / 3 = 3
A rectangular board, 3 / 4 in length and 4 / 9 in width, how many square meters in area (equation solution)
Length × width
= 3/4 × （3/4 × 4/9）
=1/4
A board is five ninth in width and one ninth longer in length than in width. How many square meters is the area of the board
Teach me
It must be 5 * 3 / 9 / 9 / 2 / 9 / 9 / 9 for length and 5 * 3 / 9 / 9 for width,
A rectangular board is 5 meters long and 4 meters wide. If the length is increased by 3 meters and the width is increased by 2 meters, how many square meters will the area of the board increase
6
There is a rectangular board. If its length is reduced by 3 meters or its width is reduced by 2 meters, its area will be reduced by 30 square meters. How many square meters is the area of this board?
Let the length be y and the width be x, and set up a system of equations: (Y-3) x-xy = 30, (X-2) y-xy = 30. By solving the system of equations, we get x = 10, y = 15, and the original area of the board = xy = 10 * 15 = 150
A rectangular board is 15cm in length and 2 / 5 in width. Cut it into the largest circle. What's the remaining area?
If you want to cut out the circle with the largest area, the diameter of the circle is the width of the rectangle
The width of the rectangle is 15x2 / 5 = 6, so the diameter of the circle is 6, the radius R is 3, and the area of the circle is the square of π r = 28.26
So the remaining area is the area of the rectangle - the area of the circle = 15x6-28.26 = 61.74
Cut out the largest circle on a piece of rectangular paper 5DM in length and 4dm in width. The area of the circle is______ d㎡．
2, = 3.14 × 4, = 12.56 (square decimeter). Answer: the area of a circle is 12.56 square decimeter
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