Two Geometry questions.

Question

anonymous · Answer

@sidsiddhartha

anonymous · Answer

I need to know if the first one is correct, and I need help solving the second one.

anonymous · Answer

@Nurali

sidsiddhartha · Answer

first one is just=(wieght of grass vale)*(7^3)=(0.15)(7*7*7)

anonymous · Answer

Ok, so I was right on the first. Can you help with the second one?

sidsiddhartha · Answer

first find the ratio of volumes

sidsiddhartha · Answer

nope the ration of volume is=1728/576
now Volume is a function of the cube of the dimensions
so 1728=(12)^3
and 
576=8.32^3
so sides are in a ratio of =12:8.32 
do u get it

anonymous · Answer

Not really.

anonymous · Answer

I do get that 343=7^3 right?

sidsiddhartha · Answer

volume = (side )^3 so $$(side)=(volume)^{1/3}$$
is'nt it?

anonymous · Answer

I don't know. I think that the answer is 196, but I'm not sure.

sidsiddhartha · Answer

sides=12/8.32
so surface area=(sides)^2
$$\frac{ 12^{2} }{ 8.32^{2}}=576/X$$
now solve for X

anonymous · Answer

76?

sidsiddhartha · Answer

its 276.88

sidsiddhartha · Answer

sorryyyy i messed up 
576=8.32^3
it should be 343

anonymous · Answer

It's ok. I'm just glad you didn't give up even when I didn't understand.

sidsiddhartha · Answer

343=7^3
so arms ratio are=12:7
ans is 196|dw:1400145360699:dw|
aww my hand writing :P