the measurements are: height= 3 length=15 width= 3
I just need to know how to work it out because i have a GCSE maths exam on Monday :)
asked Nov 12 '11 at 07:52
The area covered by the surface of a cuboid shape, be it rectangular or cube is area of all the sides.
Each side has an area defined by its height x width, and so in the case of a cube then thats easily worked out by the height x width (should be the same), and then multiplied by 6 (the number of sides).
In that case you assuming by width you are describing what I would call depth, from back to front then you will have a top, front, back and bottom at 15 x 3 (45), and two ends at 3 x 3 (9).
Therfore it would be (4 x 45) + (2 x 9) = 180 + 18 = 198 (in whatever unit that measurement was in).
The answer posted by the previous is describing the Volume, not the Area. Though that does sound to be the more likely required answer than the surface area, but who am I to judge what they would ask you for.
area of a square is h x l x w.
answered Nov 12 '11 at 08:56