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    Question

    If p: q =1:3, q: r =2:1, r: s = 1:2, s: t =3:1 and t: u

    =1:4 then value of (p q r/s t u)3 =?
    A 13/27 Correct Answer Incorrect Answer
    B 27/512 Correct Answer Incorrect Answer
    C 13/512 Correct Answer Incorrect Answer
    D 32/113 Correct Answer Incorrect Answer

    Solution

    p: q = (1:3) ├Ч2=2:6 q: r = (2:1) ├Ч3=6:3 r: s = (1:2) ├Ч3=3:6 s: t = (3:1) ├Ч2=6:2 t: u = (1:4) ├Ч2=2:8 So now- P: q: r: s:t: u = 2:6:3: 6:2:8 Then -(p q r/s t u)3= (36/96)3 = (3/8)3= 27/512

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