anonymous
  • anonymous
if h,s, V be the height, Curved surface area and volume of a cone respectively then 3piVh^3 - s^2h^2 + 9V^2 is: NOTE PI = 22/7 or 3.14
Mathematics
jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
sstarica do u want options
anonymous
  • anonymous
you mean \[(3\pi Vh)^3 - s^2h^2 + 9V^2\] so what's the problem?
anonymous
  • anonymous
no sstarica

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anonymous
  • anonymous
it is only h^3
anonymous
  • anonymous
so you have to solve it
anonymous
  • anonymous
then why do you have 3 piV multiplied by h?
anonymous
  • anonymous
i dodn't undeand rst
anonymous
  • anonymous
you have 3piVh ^3 right?
anonymous
  • anonymous
yes of course
anonymous
  • anonymous
you want to solve the equation?
anonymous
  • anonymous
yes
anonymous
  • anonymous
but your question is unfortunately unclear, what is excatly that you want?
anonymous
  • anonymous
SEE i am giving you V= 1/3 * pi * r^2 * h
anonymous
  • anonymous
lol
anonymous
  • anonymous
AND S = pi^2r^2(root of (r^2 + h^2))
anonymous
  • anonymous
so you don't know the answer of only 8th standard
anonymous
  • anonymous
no now, I got you. :)
anonymous
  • anonymous
oh k
anonymous
  • anonymous
ANSWER IT
anonymous
  • anonymous
excuse me, you're the one who asked for help, why are you being so boiled up? It's rude, please be polite.
anonymous
  • anonymous
okey
anonymous
  • anonymous
all you have to do is substitute V and S in the equation and simplify.
anonymous
  • anonymous
THIS IS THE PROBLEM THAT I M FACING THE ANSWER IS NOT IN OPTIONS
anonymous
  • anonymous
and when you do that you get in the end.\[\pi^2r^2h^4 - 4\pi r^4h^2(r^2 + h^2) + 1/3 \pi r^2h\]
anonymous
  • anonymous
yes i did that
anonymous
  • anonymous
ofcourse you won't get it corret in the first place, try again. What are the options, tell me?
anonymous
  • anonymous
okey i m giving the options
anonymous
  • anonymous
1) option - 2
anonymous
  • anonymous
2) option - 0
anonymous
  • anonymous
3) option - 2pi
anonymous
  • anonymous
4) option - 3(pi)^2
anonymous
  • anonymous
I've made a mistake, in the end of the answer I gave you above it's supposed to be \[3\pi r^2h\] and note 1/3 pir^2h
anonymous
  • anonymous
not*
anonymous
  • anonymous
the answer is 0 !
anonymous
  • anonymous
here the solution is : first you'll substitute the given in the formula and you will end up with this: \[\pi^2 r^2h^4 - 4 \pi^2r^4h^2(r^2 + h^2) + \pi^2r^4h^2\] then simplify, it's a long step but in the end you will end up with : \[-3\pi^2r^2h^4 - 3\pi^2r^2h^2\] = \[-3\pi^2h^2(r^2h^2 - r^2h^2)\] = \[-3\pi^2h^2\] x 0 = 0 That's it :)
anonymous
  • anonymous
wait that's wrong >_<
anonymous
  • anonymous
this has caused me a headache._.

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