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  1. If A : B = 1 : 2. B : C = 3 : 4 and C : D = 5 : 6, find D : C : B : A
    1. 6 : 5 : 4 : 2
    2. 6 : 3 : 2 : 1
    3. 6 : 4 : 2 : 1
    4. 48 : 40 : 30 : 15
Correct Option: D

C : D = 5 : 6
⇒ D : C = 6 : 5, C : B = 4 : 3 and B : A = 2 : 1
∴ D : C : B : A
= 6 × 4 × 2 : 5 × 4 × 2 : 5 × 3 × 2 : 5 × 3 × 1
= 48 : 40 : 30 : 15


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