Maths, Addmaths and Statistics: Post your doubts here!

[asma tareen]

for length of 6m, we put 6 in nth terms of both rods and bolts. For rods, 7*6-1 = 41 rods
for bolts 3*6+2= 20

now we need 20 bolts and 41 rods for every fence. divide 200/20 and we get 10, so we have bolts for 10 fences.

Now divide 400/41 and we can't get more a whole number. this means we have rods for only 9 fences.

So, we can't make more than 9 fences

thnx i had figured it out

 

[usama321]

HAVE U TRIED USING FORMULA I/2(Pi*R*H) + 1/2(2*pi*r2) + pi*r2???

i think something is wrong with the mark scheme. It says the answer is only 891 cm square, WTH

 

[usama321]

is this 'calculator version' mathematics included? because dont we take mathematics syllabus D?

its the same thing, calculator version or d version or whatever

 

[asma tareen]

no its correct

 

[usama321]

no its correct

well the formula you told gives the area of just the cylinder without the hemisphere to be about 2200 cm square

 

[HarithAslam]

is this 'calculator version' mathematics included? because dont we take mathematics syllabus D?

plz forgive my ineptness and stupidity.
they are the same lol

 

[asma tareen]

try again 1/2pi*r2 + 1/2(2*pi*r*h*)+1/4(4pi*r2?

 

[asma tareen]

well the formula you told gives the area of just the cylinder without the hemisphere to be about 2200 cm square

sorry it has some mistake try the next one we have to take half of the hemisphere

 

[usama321]

try again 1/2pi*r2 + 1/2(2*pi*r*h*)+1/4(4pi*r2?

actually i think you are adding an extra 1/2 pi r square at the start. I am trying 1/2 pi r^2 *h + 1/2 (2 pi r^2)

not working

 

[asma tareen]

actually i think you are adding an extra 1/2 pi r square at the start. I am trying 1/2 pi r^2 *h + 1/2 (2 pi r^2)

not working

dont we add it it for the total surface area dude think again

 

[asma tareen]

look surface area of half of hemisphere ,curved surface area of cylinder and area of circle foertotal surface area

 

[usama321]

dont we add it it for the total surface area dude think again

i don't think you are right there. Still even if you were correct, i am getting an answer of about 2544, and the mark scheme says 891? adding that would just increase it

 

[asma tareen]

i don't think you are right there. Still even if you were correct, i am getting an answer of about 2544, and the mark scheme says 891? adding that would just increase it

wait i just got the answer i guess i hae written the formula wrong here

 

[usama321]

look surface area of half of hemisphere ,curved surface area of cylinder and area of circle foertotal surface area

OMG I HAVE BEEN APPLYING THE VOLUME FOR CYLINDER

 

[asma tareen]

OMG I HAVE BEEN APPLYING THE VOLUME FOR CYLINDER

......gr8 job hope u wont do it in CIE

 

[Suchal Riaz]

Why is everyone posting the calculator version CIE?
Isnt it syllabus D in Pakistan?

man calculator version maths is same as the one which we call as syllabus-d.

 

[usama321]

......gr8 job hope u wont do it in CIE

your formula was correct *facepalm* facepalm* *facepalm*......................... *nose got flattened*

 

[asma tareen]

your formula was correct *facepalm* facepalm* *facepalm*......................... *nose got flattened*

lol wx it yaaayyyyyy

 

[usama321]

lol wx it yaaayyyyyy

made such a huge error. gosh, i can't believe it.

 

[asma tareen]

made such a huge error. gosh, i can't believe it.

better get over these silly mistakes examiner wont frgive u