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Mathematics 19 Online
OpenStudy (anonymous):

math

OpenStudy (anonymous):

Find the volume of a square pyramid with base edges of 48 cm and a slant height of 26 cm. (1 point)11,520 cm3 23,040 cm3 7,680 cm3 768 cm3

OpenStudy (anonymous):

find volume . 108.9 in.3 707.9 in.3 1,061.9 in.3 2,123.7 in.3

OpenStudy (anonymous):

the volume of a square pyramid is \[\frac{ l^2 }{ 3 }*h\] where l is the slant height. in this case the issue is to find the height which you can do using pythagoras theorem. so you first find \[(\sqrt{48^2+48^2})/2\] and you get 33.9411. then your h you get it by \[\sqrt{26^2-33.9411^2}\] and oops you get an unsolvable equation. I don't know if this is the correct info?

OpenStudy (anonymous):

for the first one, use the above formula \[V={1\over3}l^2h\] for the second one, understand that the complete volume of the cylinder is split into two identical volumes. volume of cylinder = \(\pi r^2h\)

OpenStudy (anonymous):

im still slighty confused .

OpenStudy (anonymous):

with which one

OpenStudy (anonymous):

the second

OpenStudy (anonymous):

|dw:1366222391168:dw|

OpenStudy (anonymous):

and sum of both equals the volume of the right circular cylinder

OpenStudy (anonymous):

Im not getting a correct answer .

OpenStudy (anonymous):

what value did you get

OpenStudy (anonymous):

i did 16*16*13 and 13*13*16 ad neither were correct

OpenStudy (anonymous):

what is the "radius" of the circular base??

OpenStudy (anonymous):

it is half of 13.... 13 is the diameter... \[V_{\rm cylinder}=\pi\left(13\over2\right)^2\times16\]

OpenStudy (anonymous):

and the volume of the region is HALF of that

OpenStudy (anonymous):

?

OpenStudy (anonymous):

kapeesh, Ambassador?

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