Random
Number Theory
Level
2
If A : B = 6 : 7 and B : C = 8 : 9. Find the value of C : A?
16:21
9:6
21:16
6:9
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A:B=6:7 ==> 7A = 6B => A = (6/7)B B:C=8:9 ==> 8c = 9B => C =(9/8)B Hence A:B:C = (6/7) : 1: (9/8) = 48 : 56 : 63 so, C:A= 63:48=21:16
cheers!!! :)