A) 2.5
B) 2/5
C) 5/3
D) 0.4
Correct Answer: A
Solution :
\[{{f}_{o}}-{{f}_{e}}=9\ cm\] and \[{{f}_{e}}={{f}_{o}}-9=15-9=6\]cm \[\Rightarrow m=\frac{{{f}_{o}}}{{{f}_{e}}}=\frac{15}{6}=2.5\]
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