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123F
Group Title
The volume of a square based pyramid is 81 cubic meters. What is the volume of the cube with the same side length and height?
A)9m3
B)27m3
C)243m3
D)729m3
moderator help
 3 years ago
 3 years ago
123F Group Title
The volume of a square based pyramid is 81 cubic meters. What is the volume of the cube with the same side length and height? A)9m3 B)27m3 C)243m3 D)729m3 moderator help
 3 years ago
 3 years ago

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amistre64 Group TitleBest ResponseYou've already chosen the best response.0
the volume of the base?
 3 years ago

amistre64 Group TitleBest ResponseYou've already chosen the best response.0
read it wrong
 3 years ago

amistre64 Group TitleBest ResponseYou've already chosen the best response.0
The volume of "a square based pyramid" is 81 cubic meters. What is the volume of "the cube" with the same side length and height? thats better
 3 years ago

amistre64 Group TitleBest ResponseYou've already chosen the best response.0
the volume of any pointy shape is: (1/3) (base area) (height) to wit; 81 = (1/3) (base area) (h) ; multiply thru by 3 3(81) = s^2 * h ; s^2 refers to the square base area, divide out the h. 243/h = s^2 ; now square root each part sqrt(243/h) = s
 3 years ago

amistre64 Group TitleBest ResponseYou've already chosen the best response.0
hmmm, prolly still not reading it correctly; cube tends to mean a shape with sides and height being equal, but this might mean a cube like shape in general
 3 years ago

amistre64 Group TitleBest ResponseYou've already chosen the best response.0
if height = side length we get sqrt(243/s) = s 243/s = s^2 243 = s^3 s = cbrt(243) .... might be a better interpretation but its hard to tell with the way it is written
 3 years ago

amistre64 Group TitleBest ResponseYou've already chosen the best response.0
the volume would then be cbrt(243)^3 = 243m^3 which is prolly the right answer
 3 years ago
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