If $a : b = 2 : 7$ , $c : d = 2 : 1$ , and $b : d = 5 : 4$ then find $a : c$ .

5 : 28

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4 : 19

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1 : 1

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7 : 18

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Solution

The correct option is A $5 : 28$

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a : b :: c : d

a : c :: b : d

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A : B = 1 : 2,

B : C = 3 : 4

C : D = 5 : 6,

D : C : B : A

If $A : B = 2 : 3$ and $B : C = 5 : 4$ , find $A : C$

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