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this method works for any shape which is 3-D first find the formula of the shape lets say a cuboid (rectangular block) or known as rectangular prism its formula is

H x W x L (Height x Width x length)

lets say H=4

and W=30

finally L=15

15 x 30=450 so add 450+ 60+120=630

15 x 4=60 times it by two =1260 now minus the first number you got

4 x 30= 120 and there is your answer

1260-450=810

Answer=810

This was from the book bond Assesment book paper 4 question 25 thats how you work out Surface Area

Q: How do you work out surface area?

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Total surface area = (2*pi*radius2)+(pi*diameter*height)

Another dimension is needed to work out the surface area of the roof.

Kinda of a combination of both. The surface of a 3-D object is called surface area.

surface area is basically the total area of each surface of the 3d object. Sa = 2-D A = 3-D

Volume does not, surface area does.

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It would help if the question was less obscure. What do you mean by "work"? How the surface area affects chemical processes (for example the surface area of catalysts), or diffusion, or surface areas and friction?

A quadrilateral does not have a surface area because it is not a voluminous figure.

Work out the surface area of its 6 faces individually and then add them together

Total surface area = (2*pi*radius2)+(pi*diameter*height)

You will have to work the surface area of one of the ends and then multiply that with the length.

Form a net of the Toblerone and work out the area of each individual part of it and then add up the parts together to find its entire surface area

work it out

Bulk deformation is the processing of work pieces that have relatively small surface area to volume ratio (or surface area to thickness). In bulk deformation processing ,the thickness or cross section of work piece changes.

Another dimension is needed to work out the surface area of the roof.

Work out the area of each of the 5 nets and then add them together

It is the surface area of the two ends plus the surface area of the curved surface. Surface area of each end is pir2 Surface area of the curved surface is 2pirh Total surface area = 2pir2 + 2pirh

The total surface area! The total surface area! The total surface area! The total surface area!