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

If A : B = 2 : 3, B : C = 4 : 5 and C : D = 6 : 7,then A : D =

A

16 : 35

B

48 :105

C

35 : 8

D

8 : 35.

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