A) \[4:1\]
B) \[1:4\]
C) \[5:4\]
D) \[5:9\]
Correct Answer: B
Solution :
\[(B-A)\times \frac{30}{100}=(B+A)\times \frac{18}{100}\] \[\therefore \] \[\frac{B-A}{B+A}=\frac{18}{30}=\frac{3}{5}\] By componendo and divldendo, \[\frac{2B}{-2A}=\frac{3+5}{3-5}=\frac{8}{-2}=\frac{4}{-1}\] \[\Rightarrow \] \[\frac{B}{A}=\frac{4}{1}\] \[\Rightarrow \] \[A:B=1:4\]You need to login to perform this action.
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