Ratio, Proportion


  1. If 0.8 x A = 0.09 x B, then find A : B.









  1. View Hint View Answer Discuss in Forum

    Given that 0.8 x A = 0.09 x B
    ⇒ A/B = 0.09/0.8 = 9/80

    Correct Option: A

    Given that 0.8 x A = 0.09 x B
    ⇒ A/B = 0.09/0.8 = 9/80
    ∴ A : B = 9 :80


  1. If 1/x : 1/y : 1/z = 2 : 3 : 5, then determine x : y : z .









  1. View Hint View Answer Discuss in Forum

    Let 1/x = 2K, 1/y = 3K and 1/z = 5K
    Then, x = K/2, Y = K/3 and z = K/5
    ∴ x : y : z = K/2 : K/3 : K/4

    Correct Option: D

    Let 1/x = 2K, 1/y = 3K and 1/z = 5K
    Then, x = K/2, Y = K/3 and z = K/5
    ∴ x : y : z = K/2 : K/3 : K/4
    = 1/2 : 1/3 : 1/5
    = 15 : 10 : 6



  1. If a/3 = b/8, then ( a + 3 ) : ( b + 8 ) is equal to ?









  1. View Hint View Answer Discuss in Forum

    Let a/3 = b/8 = K
    Then, a = 3K, b = 8K
    ∴ (a + 3) / (b + 8) = (3K + 3) / (8K + 8)

    Correct Option: A

    Let a/3 = b/8 = K
    Then, a = 3K, b = 8K
    ∴ (a + 3) / (b + 8) = (3K + 3) / (8K + 8)
    = [3( K + 1)] / [8(K+1)] = 3/8
    ∴ ( a + 3 ) : (b + 8) = 3 : 8


  1. If 1/2 of A = 2/5 of B = 1/3 of C, then A : B : C is equal to ?









  1. View Hint View Answer Discuss in Forum

    1/2 of A = 2/5 of B = 1/3 of C
    1/2 x A = 2/5 x B = 1/3 x C
    Let A/2 = 2B/5 = C/3 = K
    Then, A = 2K, B = 5K/2, C = 3K

    Correct Option: A

    1/2 of A = 2/5 of B = 1/3 of C
    1/2 x A = 2/5 x B = 1/3 x C
    Let A/2 = 2B/5 = C/3 = K
    Then, A = 2K, B = 5K/2, C = 3K
    ⇒ A: B : C = 2k : 5k/2 : 3k
    ∴ A: B : C = 4 : 5 : 6



  1. If xy =36, then which of the following is correct?









  1. View Hint View Answer Discuss in Forum

    xy =36
    ⇒ xy = 4 x 9,
    ⇒ x/9 = 4/y

    Correct Option: A

    xy =36
    ⇒ xy = 4 x 9,
    ⇒ x/9 = 4/y
    ∴ x : 9 = 4 : y