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Author Topic: C1 and C2 DOUBTS HERE!!!!!  (Read 98244 times)

Offline astarmathsandphysics

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Re: C1 DOUBTS HERE!!!!!
« Reply #105 on: May 25, 2010, 11:34:18 am »
Good stuff
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Offline halosh92

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Re: C1 DOUBTS HERE!!!!!
« Reply #106 on: May 25, 2010, 01:03:04 pm »
yayyyy i lost one mark only  ;D ;D ;D
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everyday we wake up is a miracle, then how do we say miracles dont happen?????

Offline coatseville

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Re: C1 DOUBTS HERE!!!!!
« Reply #107 on: May 25, 2010, 03:06:00 pm »
Thanks :)
Yah i think i did well also :)
But what do you think the Grade threshold will be?
I think it mite be lower than other years... like maybe 60/75 or so what do you think?
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Offline Ukhti-R

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Re: C1 DOUBTS HERE!!!!!
« Reply #108 on: May 25, 2010, 09:09:33 pm »
Thanks T.Q! :D
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Offline halosh92

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Re: C2 DOUBTS HERE!!!!!
« Reply #109 on: May 26, 2010, 03:47:12 pm »
hey!
anyone has 2009 june ms !!!!!!!!!!! rili urgent!
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everyday we wake up is a miracle, then how do we say miracles dont happen?????

Offline Saladin

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Re: C2 DOUBTS HERE!!!!!
« Reply #110 on: May 26, 2010, 05:11:54 pm »
Quote from: halosh92 on May 26, 2010, 03:47:12 pm
hey!
anyone has 2009 june ms !!!!!!!!!!! rili urgent!

here
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Offline halosh92

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Re: C2 DOUBTS HERE!!!!!
« Reply #111 on: May 26, 2010, 05:43:36 pm »
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everyday we wake up is a miracle, then how do we say miracles dont happen?????

Offline halosh92

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Re: C2 DOUBTS HERE!!!!!
« Reply #112 on: May 26, 2010, 08:57:34 pm »
edexcel 2009 june
Q9a
plzzzz help and explain in details.
anyone? :)
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everyday we wake up is a miracle, then how do we say miracles dont happen?????

Offline Saladin

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Re: C2 DOUBTS HERE!!!!!
« Reply #113 on: May 27, 2010, 04:36:39 pm »
Quote from: halosh92 on May 26, 2010, 08:57:34 pm
edexcel 2009 june
Q9a
plzzzz help and explain in details.
anyone? :)

on it now.
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Offline Saladin

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Re: C2 DOUBTS HERE!!!!!
« Reply #114 on: May 27, 2010, 04:52:25 pm »
We need to find h in terms of r.

Therefore, the volume is equal to,

300=\frac{1}{2}r^2\theta h

h=\frac{600}{r^2}

Now you need to find what makes the surface area.

2 sectors + 2 rectangles + curved face

So, \frac{1}{2}*2*r^2+rh+2rh


r^2+\frac{1800}{r}

I hope that explains everything.
« Last Edit: May 27, 2010, 05:00:16 pm by Engraved »
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Offline halosh92

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Re: C2 DOUBTS HERE!!!!!
« Reply #115 on: May 27, 2010, 05:25:17 pm »
Quote from: Engraved on May 27, 2010, 04:52:25 pm
We need to find h in terms of r.

Therefore, the volume is equal to,

300=\frac{1}{2}r^2\theta h

h=\frac{600}{r^2}

Now you need to find what makes the surface area.

2 sectors + 2 rectangles + curved face

So, \frac{1}{2}*2*r^2+rh+2rh


r^2+\frac{1800}{r}

I hope that explains everything.

gr8!!!!!!!!!!!!!! THANKYOU ;)
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everyday we wake up is a miracle, then how do we say miracles dont happen?????

Offline Saladin

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Re: C2 DOUBTS HERE!!!!!
« Reply #116 on: May 27, 2010, 05:31:22 pm »
Quote from: halosh92 on May 27, 2010, 05:25:17 pm
gr8!!!!!!!!!!!!!! THANKYOU ;)

Engraved signing off.  8)
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Offline halosh92

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Re: C2 DOUBTS HERE!!!!!
« Reply #117 on: May 28, 2010, 08:14:16 pm »
may/june 2007 C2 edexcel
Q9a
someone plzz explain why were not starting fomr zero :s
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everyday we wake up is a miracle, then how do we say miracles dont happen?????

Offline Saladin

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Re: C2 DOUBTS HERE!!!!!
« Reply #118 on: May 28, 2010, 08:15:52 pm »
Quote from: halosh92 on May 28, 2010, 08:14:16 pm
may/june 2007 C2 edexcel
Q9a
someone plzz explain why were not starting fomr zero :s

Your question does not make sense.
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Offline halosh92

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Re: C2 DOUBTS HERE!!!!!
« Reply #119 on: May 28, 2010, 08:26:04 pm »
Quote from: Engraved on May 28, 2010, 08:15:52 pm
Your question does not make sense.

if u look at the marking scheme the curve is staring from 0.5 not from 0
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everyday we wake up is a miracle, then how do we say miracles dont happen?????
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