Qualification > Math
IGCSE MATHS Doubts
astarmathsandphysics:
can some1 now do my Q....which i ve posted half an hour bfore.......if an1 knws how to do it...lol
Do d minus cii
Dark Prince:
--- Quote from: astarmathsandphysics on May 16, 2010, 07:39:51 pm ---can some1 now do my Q....which i ve posted half an hour bfore.......if an1 knws how to do it...lol
Do d minus cii
--- End quote ---
thnkx...sir...can u xplain
Adzel:
m/j 2007 p4 q7 + (explaination please) :)
Vin:
I'd solved this one earlier .. long time ago .. lemme check .. ;)
Got it !! quite easy ..
a) is quite direct ..
for such kinda ques wat i always do is look for the units .. for eq in this one..
they hav asked Calculate the number of cubic metres .. 3 measurements hav to be multiplied (this is jus a tip .. this is how i under the ques)
so for this vol = 0.3 m x 1.2 x 3 m/min x 60 (for 1 hour)
= 64.8 cm3
-----------------------------------
b) same method as the previous ..
first
vol = 0.8m x 1.2m x 15 m/min x 60
= 864 cm3
for % , difference is 864 - 64.8 = 799.2
per cent = diff/original x 100
= 799.2
--------- x 100
64.8
= 1230 %
-----------------------------------
c) firstly always remember to convert ur units to units asked in ques..
1.3 mm = 0.0013m
vol = pi rrh
2 = pi r2 x 0.0013
on solvin = 22.1 m
-----------------------------------
d) take the length as L ..
surface area = 50.4/0.12
= 420 m2
SA = (0.8 x L) + (1.2 x L) + (0.8 x L)
420 = 0.8L + 1.2L + 0.8L
420 = 2.8 L
L = 150m .. done !! ;)
mdwael:
I have a question I dont really think its maths but Im going to say it anyway. This is about my friend who did IT exam few days ago, well he seems to have forgotten to check the number of pages in his paper, only then after the exam had finished that he realized 2 pages worth 20 marks were missing from his paper which is out of (120) he got approximately 70 so will his mark be 70/100? or they wont forgive him and his mark will be 70/120?
Sorry for asking this here but Im new and I didnt find a place to post it..
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version