A) \[-20\]
B) \[-60\]
C) \[60\]
D) \[-30\]
Correct Answer: C
Solution :
\[\frac{1}{u}+\frac{1}{v}=\frac{1}{f}\] \[\Rightarrow \] \[\frac{1}{v}=\frac{1}{20}-\frac{1}{30}=\frac{3-2}{60}=\frac{1}{60}\] \[\Rightarrow \] \[v=60\]You need to login to perform this action.
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