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Author Topic: PP2 Math question  (Read 3889 times)

Offline pisecs

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Re: PP2 Math question
« Reply #15 on: May 12, 2009, 09:31:54 pm »
Quote from: angell on May 12, 2009, 08:50:05 pm
huh im suckin at math so much rite now....nyways guys could someone tell me how to solve Q.5, Q.7  Oct/Nov 2008 P2...

IN Q.7 could somebody tell me the bounds im supposed to take?? im taking 6.15 and 8.15 but not gettin the answer according to the mark scheme??

Q.5
just imagine that you are rotating the square from the point B 90*clockwise and where will you get D?
D will be on the same line with B
so wot you have to do it take the length of DC
and with a compass, from point B, draw a quater of a circle until the point where you get D after you rotate it

Q7.
yes, the upper bounds are 6.15 and 8.15
you just multiply them
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Offline angell

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Re: PP2 Math question
« Reply #16 on: May 12, 2009, 09:40:50 pm »
thank u loads....

now o/n 2008again... q.9b and 14b
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oh churiyaan charha dey..
oh mehndiya kara dey..
oh jhanjara pawan dey...
On the dance floor oh mundiye...Nach Baliye!

--~*O yaara dhol bajaake.. O yaara jashan mana ke!!




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Offline angelic

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Re: PP2 Math question
« Reply #17 on: May 12, 2009, 10:00:05 pm »
hii guyz  :)
can some1 plz help me ..
i dont kno how to solve Q 10 from M/J/08 pg 4
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Offline pisecs

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Re: PP2 Math question
« Reply #18 on: May 12, 2009, 10:08:06 pm »
here i've solved your questions
save the pics to see them in full size



« Last Edit: May 12, 2009, 11:03:13 pm by pisecs »
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Offline angell

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Re: PP2 Math question
« Reply #19 on: May 12, 2009, 10:14:04 pm »
find the volume of the glass using the cylinder formula

it will be 1385.4

divide it by 216.u get 6.4...

take 6 as a scale factor
and multiply
3X6=18 radius

7X6=42 height/..

thats what i did:S dunno if it is right tho!!!
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oh churiyaan charha dey..
oh mehndiya kara dey..
oh jhanjara pawan dey...
On the dance floor oh mundiye...Nach Baliye!

--~*O yaara dhol bajaake.. O yaara jashan mana ke!!




-----------------------------------------

Offline angell

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Re: PP2 Math question
« Reply #20 on: May 12, 2009, 10:15:54 pm »
thanks piscecs:)

what about MY question:(
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oh churiyaan charha dey..
oh mehndiya kara dey..
oh jhanjara pawan dey...
On the dance floor oh mundiye...Nach Baliye!

--~*O yaara dhol bajaake.. O yaara jashan mana ke!!




-----------------------------------------

Offline angell

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Re: PP2 Math question
« Reply #21 on: May 12, 2009, 10:22:24 pm »
ok now i see the answer..um sorrrrry but i wanted to know part b? how do we find the co-ordinates?
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oh churiyaan charha dey..
oh mehndiya kara dey..
oh jhanjara pawan dey...
On the dance floor oh mundiye...Nach Baliye!

--~*O yaara dhol bajaake.. O yaara jashan mana ke!!




-----------------------------------------

Offline angelic

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Re: PP2 Math question
« Reply #22 on: May 12, 2009, 10:34:43 pm »
Quote from: angell on May 12, 2009, 10:14:04 pm
find the volume of the glass using the cylinder formula

it will be 1385.4

divide it by 216.u get 6.4...

take 6 as a scale factor
and multiply
3X6=18 radius

7X6=42 height/..

thats what i did:S dunno if it is right tho!!!

how did u find 1385.4  ??? .. i used the cylinder formula to find the volume of the glass and i got 197.9 ..
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Offline pisecs

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Re: PP2 Math question
« Reply #23 on: May 12, 2009, 10:40:32 pm »
Quote from: angell on May 12, 2009, 10:14:04 pm
find the volume of the glass using the cylinder formula

it will be 1385.4

divide it by 216.u get 6.4...

take 6 as a scale factor
and multiply
3X6=18 radius

7X6=42 height/..

thats what i did:S dunno if it is right tho!!!

yes thats correct, i've explained on a pic


i've solved part b too, it's under a)
so from a), we got y=2x-4
and in b) we know that y=0
so we find x
i underlined the answer in pink
« Last Edit: May 12, 2009, 11:08:07 pm by pisecs »
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Offline angelic

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Re: PP2 Math question
« Reply #24 on: May 12, 2009, 10:50:58 pm »
everything is clear now .. thank u so much!!! :D ...
i cant believe that the exam is tomorrow .. im really worried!  :-[
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Offline pisecs

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Re: PP2 Math question
« Reply #25 on: May 12, 2009, 10:58:16 pm »
Quote from: angelic on May 12, 2009, 10:50:58 pm
everything is clear now .. thank u so much!!! :D ...
i cant believe that the exam is tomorrow .. im really worried!  :-[

no probz~ and yep the exam's 2morrow! dont worry, you'll do fine
the may/june exams are usually easier than the oct/nov ones
and if you've done enough past papers then you'll totally be fine!
maths is easy~ i'm more worried about the chem exam the day after

well~ GOOD LUCK EVERYONE!!
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