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Mathematics 7 Online
OpenStudy (judson_rockets):

Which is true about the volume or surface area of these prisms? A. The volume of B is greater than the volume of A. B. The surface area of B is greater than the surface area of A. C. The volume of A is greater than the volume of B. D. The surface area of A is greater than the surface area of B.

OpenStudy (welshfella):

First calculate the volumes of the 2 prisms Volume = length * width * height Can you do that?

OpenStudy (judson_rockets):

Maybe

OpenStudy (judson_rockets):

They both equal 60

OpenStudy (welshfella):

try for prism A length = 6 width = 2 and height = 5

OpenStudy (welshfella):

Yea So the answer is not A or C Now surface area is the sum of 6 sides There are 3 pairs of sides of equal area

OpenStudy (judson_rockets):

Yup so what do i have to do

OpenStudy (welshfella):

just work out the surface areas of both prisma For example prisn A has 2 sides 5 by 6 2 side 2 by 6 2 sides 2 by 5

OpenStudy (welshfella):

2 * 30 + 2*12 + 2*10

OpenStudy (judson_rockets):

104

OpenStudy (welshfella):

thats right so work out the area of prosm B in the same way and you can compare them.

OpenStudy (welshfella):

* prism lol!

OpenStudy (aziaboo45):

sorry but i got nothing

OpenStudy (judson_rockets):

I thought u said i caint talk to u Anymore rember

OpenStudy (aziaboo45):

yeah but you need help so

OpenStudy (judson_rockets):

Fine

OpenStudy (aziaboo45):

u mad

OpenStudy (judson_rockets):

No why ???

OpenStudy (aziaboo45):

nun

OpenStudy (judson_rockets):

KKKKKKKKKKK

OpenStudy (aziaboo45):

btw the answer is d

OpenStudy (judson_rockets):

I know

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