Here is a picture of a cube, and the net of this cube.What is the surface area of this cube?
2 answers:
The surface area of the net of cube is 726 sq cm
The surface area of the cube is 484 sq cm
Step-by-step explanation:
Here we need to find out the surface area of net of a cube and a cube
Given,
Each side of the cube is 11 cm
The net of a cube consists of 6 squares.
Formula
The surface area of the net of the cube = 6 X ( area of each square)
= 6 X ( 11 X 11) sq cm
= 726 sq cm
Now, the surface area of a cube = lateral surface area of the cube
Formula
The lateral surface area of the cube = 4 X
= 4 X sq cm
= 484 sq cm
Hence the surface area of the net of a cube and only a cube is different.
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Answer:
10 cm
Step-by-step explanation:
From the diagram,
Applying,
lw = 5/2(bh)..................... Equation 1
Where l = length of the rectangle, w = width of the rectangle, b = base of the triangle, h = height of the triangle.
make w the subject of the equation
w = 5(bh)/2l............... Equation 2
From the diagram,
Given: l = 12 cm, b = 6 cm, h = 8 cm
Substitute into equation 2
w = 5(6×8)/(2×12)
w = 10 cm
Hence the width of the rectangle is 10 cm
