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Mathematics 8 Online
OpenStudy (anonymous):

How do you solve this? @Directrix

OpenStudy (anonymous):

The answer leading to the forumla is within the question. Ask yourself, what do you need to find out? How do I find that out?

OpenStudy (anonymous):

I know we are looking for the Volume of a Cylinder , but since we don't have the height we have to solve for h (stuck here) ; plug h in the equation , thus = Volume which = final answer!

OpenStudy (anonymous):

My bad, I forgot about the height ^^;; I assume the height for both cylinders is the same? It does say "similar size", so what we can do is: Type 2 Vol / pr^2 = h That's the h.

OpenStudy (anonymous):

I checked it and the answer matches one of yours :)

OpenStudy (anonymous):

.. we dnt have the vol. :/

OpenStudy (anonymous):

?

OpenStudy (anonymous):

p = pi?

OpenStudy (anonymous):

Yeah, sorry, typo there.

ganeshie8 (ganeshie8):

Or, we may use the similarity ratio : if sides are in ratio a/b, then volumes will be in ratio (a/b)^3

ganeshie8 (ganeshie8):

whats the ratio of sides of type1 and type2 ?

OpenStudy (anonymous):

sides ...?.?

ganeshie8 (ganeshie8):

sides/radius/lengths - all these are same species.

ganeshie8 (ganeshie8):

let me change the question :) whats the ratio of radii of type1 and type2 ?

OpenStudy (anonymous):

oh ! 4/7 = 0.57 :) If you're saying to cube that, 0.57143^3 = 0.18659 ~ aprox 0.19 @ganeshie8

ganeshie8 (ganeshie8):

perfect ! so volume of type1 cylinder = 0.19*(volume of type2 cylinder) = ?

OpenStudy (anonymous):

= D. 229.81 :DD Thank you :))

ganeshie8 (ganeshie8):

good job !!

OpenStudy (anonymous):

of course without rounding *

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