A) 12 cm
B) 15 cm
C) 18 cm
D) 30 cm
Correct Answer: B
Solution :
[b] \[u=24\,cm,\]\[v=x\] using \[\frac{1}{v}-\frac{1}{u}=\frac{1}{f}\] or \[\frac{1}{x}-\frac{1}{24}=\frac{1}{40}\] \[\therefore \] \[x=15\,cm\]You need to login to perform this action.
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