[SCRA 1994]
A) 6.5 cm
B) 8.0 cm
C) 9.5 cm
D) 10.0 cm
Correct Answer: D
$ \frac{1}{f}=\frac{1}{v}-\frac{1}{u} $
$ \Rightarrow $ $ \frac{1}{+5}=\frac{1}{v}-\frac{1}{(-10)}\Rightarrow v=10 $ $ cm $
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