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  1. W

    math p3 question... please help

    november 08 question no. 8 An underground storage tank is being filled with liquid Initially the tank is empty. At time t hours after filling begins, the volume of liquid is V m3 and the depth of liquid is h m. It is given that V = 4/3 h^3 The liquid is poured in at a rate of 20m3 per hour, but...
  2. W

    Question for S08 Maths Paper 3

    in first part.. u actually have to identify the modulus of z-i for that, open the brackets and shift i to l.h.s take out 2 as common z-i=2[cosx - i(sinx)] it is the general form where 2 is the mod it is proven.... then draw the circle of radius 2 and centre i
  3. W

    S1 permutations question

    it really helped out.... thanks alot hina :) :)
  4. W

    S1 permutations question

    The letters of the word POSSESSES are written on 9 cards, one on each card. The cards are shuffled and four of them are selected and arranged in a straight line. How many arrangements are there of 4 letters. answer is 115 dont know how to do it
  5. W

    June 2003 S1

    p(P and G) that is sum up the probablility of Grand parents of those houses where parents are present ( house no 1 and 2) divide by p(G) in part (ii)
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