If A : B = 3 : 4, B : C = 5 : 7 and C : D = 8 : 9 then A : D is equal to

If A : B = 3 : 4, B : C = 5 : 7 and C : D = 8 : 9 then A : D is equal

1.	If A : B = 3 : 4, B : C = 5 : 7 and C : D = 8 : 9 then A : D is equal to
A.	3 : 7
B.	7 : 3
C.	21 : 10
D.	10 : 21
Answer» E.

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If A : B = 3 : 4, B : C = 5 : 7 and C : D = 8 : 9 then A : D is equal to

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