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Mathematics 6 Online
OpenStudy (lifeisadangerousgame):

"Both of the prisms below have the same volume. What is the height of prism #2?" How do I find the height of prism two?

OpenStudy (lifeisadangerousgame):

OpenStudy (karatechopper):

ah..ok. Lets see

OpenStudy (karatechopper):

Does the question you are looking at say, "find the height?"

OpenStudy (lifeisadangerousgame):

Yea, it wants me to find the height of #2

OpenStudy (karatechopper):

Ok..so I would set it up as a proportion

OpenStudy (karatechopper):

Lemme draw it out and show ya

OpenStudy (karatechopper):

|dw:1367770663264:dw|

OpenStudy (karatechopper):

|dw:1367770751859:dw|

OpenStudy (karatechopper):

Okay so we can see that 2 is the height for prism 1 and x is the height for prism two..correct?

OpenStudy (lifeisadangerousgame):

Correct

OpenStudy (karatechopper):

So lets set up a proportion! What are the base lengths for prism 1 and prism two?

OpenStudy (lifeisadangerousgame):

5 and 5? and just to just out a limb is the answer 5 by any chance?

OpenStudy (karatechopper):

Mmm..Idk. I was going to solve it with you lol.

OpenStudy (karatechopper):

Do you know if both of the prisms have an equal volume?

OpenStudy (lifeisadangerousgame):

Haha sorry :b When you drew it out I kinda flipped it on its side, yes they have an equal volume

OpenStudy (karatechopper):

oh!!!!

OpenStudy (karatechopper):

Then I have a much easier way for you to solve it

OpenStudy (karatechopper):

forget proportions! lets make equations!!

OpenStudy (anonymous):

isn't this as simple as V1 = 2*5*5 = V2 = 1*5*h so find h from 2*5*5 = 1*5*h

OpenStudy (karatechopper):

Ok..so do you know what the Volume formula is?

OpenStudy (karatechopper):

Yep. @gohangoku58 got to where I was leading to

OpenStudy (anonymous):

volume of prism is just the product of all 3 sides.

OpenStudy (karatechopper):

mhm..

OpenStudy (lifeisadangerousgame):

Thanks KC and gohangoku58 :D I'm going to do the practice questions just to practice it a little more ^_^

OpenStudy (karatechopper):

:)

OpenStudy (anonymous):

welcome ^_^

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