A) 12 : 8 : 21
B) 8 : 21 : 12
C) 8 : 12 : 21
D) 21 : 8 : 12
Correct Answer: C
Solution :
\[a:b=\frac{3}{2}:\frac{9}{4}\] and \[b:c=2:\frac{9}{4}\] \[\Rightarrow \] \[a:b=6:9\] and \[b:c=4:7\] \[\Rightarrow \] \[a:b=8:12\] and \[b:c=12:21\] \[\Rightarrow \] \[a:b=8:12\] and \[b:c=12:21\] \[\therefore \] \[a:b:c=8:12:21\]You need to login to perform this action.
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