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Maths, Addmaths and Statistics: Post your doubts here!
- Thread starter OakMoon!
- Start date
Thanks a bunch
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Thus 7 Years, to 7 days, but must do 4 a day
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Who the hell tells you to do 2 a day? I can do 6-7 a day worthy 1.5 hours32 papers from 2010 to 2013 november. 12 papers from 2007 to 2009.
Total 44 papers.
44 * 1.5 = 66 hours.
If i solve 2 papers a day, it will be minimum of 22 days.
And i still haven't studied the latest topics of Integration, Relative Velocity, Kinematics. Can't find a good teacher. >.<
Not to mention all the other subjects i have to study, too. And all their past papers.
So Conclusion: It's impossible to get a distinction.
It is not Impossible
Q8...
use the Pythagoras theorem and you'll get the answer.
Q10...
find the arc length AB (= 90/360 * 2 pie r) and multiply it with the height of the cylinder.
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kindly help me wid the last 2 parts. explain fully. i knw that x=0
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ii)
just put the value of x in the equation,
y = 5a^x
any number^0 = 1(Remember this!)
and thus y = 5a^0 = 5 * 1 = 5
and the coordinates are (0, 5)
iii)
join the 2 points P (0, 5) and (2, 45)
and find gradient
like, m = (y1-y2)/(x1-x2) = (45-5)/(2-0) = 40/2 = 20
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LOL! I could have done that, HELL ME!ii)
just put the value of x in the equation,
y = 5a^x
any number^0 = 1(Remember this!)
and thus y = 5a^0 = 5 * 1 = 5
and the coordinates are (0, 5)
iii)
join the 2 points P (0, 5) and (2, 45)
and find gradient
like, m = (y1-y2)/(x1-x2) = (45-5)/(2-0) = 40/2 = 20
- Messages
- 785
- Reaction score
- 2,290
- Points
- 253
***amd***, cant believe you just liked that
- Messages
- 785
- Reaction score
- 2,290
- Points
- 253
Zoha Sis,Aargh
(i) Formulae here is = Pi*Speed*Square of Radius
So, in this case
Pi =Moslty 3.142, but Varies Calculator to Calculator
Speed = 300cm/s as given
Sqaure of Radius = 4.5 * 4.5 = 20.25
hence we have, 3.142 (Pi) x 300 (Speed) x 20.25 (Sqaure of Radius)= 19087.65cm/s
Lets Simplyfy =19088 cm/s or 19.1 liters
.......................................................................................................................................................
You might want to check Marking Schemes, it is more dependant on value of Pi, like it can vary a little, but you wont lose marks.......
.......................................................................................................................................................
Now,
(ii) in a minute you will have 19.1 x 60 =1416 Liters Sent throught pipe
So for 25000 Liters, we will need 25000/1416= 21.81 Minutes, ... Rounded to 22 minutes
P.S: I am not Professional like amd, so Check the Marking Scheme
***amd***, you might be helpful, if I am incorrect!
Last edited:
Aargh
i dunnoZoha Sis,
(i) Formulae here is = Pi*Speed*Square of Radius
So, in this case
Pi =Moslty 3.142, but Varies Calculator to Calculator
Speed = 300cm/s as given
Sqaure of Radius = 4.5 * 4.5 = 20.25
hence we have, 3.142 (Pi) x 300 (Speed) x 20.25 (Sqaure of Radius)= 19087.65cm/s
Lets Simplyfy =19088 cm/s or 19.1 liters
.......................................................................................................................................................
You might want to check Marking Schemes, it is more dependant on value of Pi, like it can vary a little, but you wont lose marks.......
.......................................................................................................................................................
Now,
(ii) in a minute you will have 19.1 x 60 =1416 Liters Sent throught pipe
So for 25000 Liters, we will need 25000/1416= 21.81 Minutes, ... Rounded to 22 minutes
P.S: I am not Professional like amd, so Check the Marking Scheme
***amd***, you might be helpful, if I am incorrect!
i just typed the answer Aargh
i) just find the area of this shaded cylindrical region
ii) 1 cubic cm = 1 ml
and 25000 l = 25000000 ml
so time taken for 1 ml (cubic cm) to come out = 1 sec
thus time taken for 25000000 ml = 25000000/(Volume u found in 'i')
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n wen i m dividing 25000/1416 in Bii ..ans is not 21.81
n wen i m dividing 25000/1416 in Bii ..ans is not 21.81
Oh , Typed incoreect ......... It 1146, You can do it yoursef (19.1 x 60)