Qualification > Math

IGCSE MATHS Doubts

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Ghost Of Highbury:

--- Quote from: Mr.DitD on May 17, 2010, 03:02:34 pm ---I understand that Vol. = 1/3 * pi * (2x)^2 * y

But i dont know how it becomes: (4x^2ypi)/3

Can u please explain furthur if possible? Thanks a lot!!

--- End quote ---


(2x)^2 = 4x^2.
(4x^2 * pi * y )/3 = (4x^2ypi)/3

Mr.DitD:

--- Quote from: A@di on May 17, 2010, 03:22:29 pm ---
(2x)^2 = 4x^2.
(4x^2 * pi * y )/3 = (4x^2ypi)/3

--- End quote ---

THANKS A LOT!!!! :D

princess12:
can any 1 explain me oct 2009 paper 4  question 1
urgently fast plaese

Dibss:

--- Quote from: princess12 on May 17, 2010, 04:28:57 pm ---can any 1 explain me oct 2009 paper 4  question 1
urgently fast plaese

--- End quote ---
any particular subpart or the whole question?

princess12:
whole question please with briefly description

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