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3 years ago

Here is a picture of a cube, and the net of this cube.What is the surface area of this cube?

Mathematics

2 answers:

sasho [114]3 years ago

6 0

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 $side^{2}$

= 4 X $11^{2}$ sq cm

= 484 sq cm

Hence the surface area of the net of a cube and only a cube is different.

Murljashka [212]3 years ago

4 0

Answer:

726

Step-by-step explanation:

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2 years ago

The angle of elevation of an unfinished tower from a point of 120m away from its base is 25 degrees. How much higher will the to

Sav [38]

Answer:

44.73 m

Step-by-step explanation:

Given that the angle of elevation of an unfinished tower from a point of 120m away from its base is 25 degrees.

Using trigonometry ratio, the height of the tower can be calculated by

Tan Ø = height / base

Tan 25 = height / 120

Make height the subject of formula

Height = 120 × tan 25

Height = 55.96 m

How much higher will the tower need to be raised so that its angle of elevation from the same point will be 40 degrees?

Using the same formula to calculate the new height.

Tan 40 = new height / base

Tan 40 = new height / 120

Make the new height the subject of the formula.

New height = 120 × tan 40

New height = 100.69 m

Increase in height = new height - height

Increase in height = 100.69 - 55.96

Increase in height = 44.73m

Therefore, the tower will need 44.73m to be raised so that its angle of elevation from the same point will be 40 degrees.

4 0

3 years ago

Find COS Instructions: Find the value of the trigonometric ratio. Make sure to simplify the If needed

Paraphin [41]

Answer:

Sin A = 15 / 17

Step-by-step explanation:

Given a right angled triangle, we are to obtain the Sin of the angle A ;

Using trigonometry, the sin of the angle A, Sin A is the ratio of the angle opposite A to the hypotenus of the right angle triangle.

Hence. Sin A = opposite / hypotenus

Opposite = 15 ; hypotenus = 17

Sin A = 15 / 17

8 0

2 years ago

Set A contains 35 elements and set B contains 22 elements. If there are 40 elements in (A ∪ B) then how many elements are in (A

Leona [35]

Answer:

Step-by-step explanation:

The computation of the number of elements are in (A ∩ B) is shown below;

Given that

Set A contains 35 elements

And, set B contains 22 elements

Now if there are 40 elements in (A ∪ B)

So, the number of elements are in (A ∩ B) is

= 35 + 22 - 40

= 17

5 0

2 years ago

Look at the photo pick A B C D either one explanation not needed thank you! <3

hjlf

Answer:

Step-by-step explanation:

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5 0

3 years ago

Read 2 more answers