Ratio, Proportion


  1. If 2A = 3B = 4C , then A : B : C is ?









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    Let 2A = 3B = 4C = x
    Then A = x/2, B = x/3 and C = x/4

    Correct Option: C

    Let 2A = 3B = 4C = x
    Then A = x/2, B = x/3 and C = x/4
    ∴ A : B : C = x/2 : x/3 : x/4
    Hence A : B : C = 6 : 4 : 3


  1. If A : B = 2 : 3, B : C = 4 : 5 and C : D = 6 : 7, then A : D is equal to ?









  1. View Hint View Answer Discuss in Forum

    ∵ A/D = (A/B) x (B/C) x (C/D)

    Correct Option: C

    ∵ A/D = (A/B) x (B/C) x (C/D) = (2/3) x (4/5) x (6/7) = 16/35
    ∴ A : D = 16 : 35



  1. If A = B/3 and B = C/2, then A : B : C is ?









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    Let A = x
    Then, B = 3x, C = 2B = 6x

    Correct Option: A

    Let A = x
    Then B = 3x, C = 2B = 6x
    &there4 A : B : C = x : 3x : 6x = 1 : 3 : 6


  1. If A : B = 5 : 7 and B : C = 6 : 11, then A : B : C is ?









  1. View Hint View Answer Discuss in Forum

    L.C.M. of 7 and 6 is 42
    ∴ A : B = 5 : 7 = 30 : 42
    and B : C = 6 : 11 = 42 : 77

    Correct Option: B

    L.C.M. of 7 and 6 is 42
    ∴ A : B = 5 : 7 = 30 : 42
    and B : C = 6 : 11 = 42 : 77
    Hence A : B : C = 30 : 42 : 77



  1. If A : B = 7 : 9 and B : C = 3 : 5 then A : B : C is ?









  1. View Hint View Answer Discuss in Forum

    A : B = 7 : 9
    and B : C = 3 : 5 = 9 : 15

    Correct Option: C

    A : B = 7
    and B : C = 3 : 5 = 9 : 15
    ∴ A : B : C = 7 : 9 : 15