A:B=1:2 B:C=3:5 C:D=2:5 ABCD?
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If A:B=1:2, B:C = 3:4 and C:D = 5:6 what is A:D?
A:B=1:2, or
1B = 2A …(1)
B:C = 3:4, or
4B = 3C …(2)
C:D = 5:6, or
5D = 6C …(3)
From (1) and (2)
1B = 2A, or 4B = 8A = 3C, Or 6C = 16A
Therefore 5D = 16A, or
A:D = 5:16.
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