A. 6.6cm
B. 11.1cm
C. 13.3cm
D. 20.0cm
Correct Answer: Option C
Explanation
Given, image size = 3U
object size = U
focal length = 10cm
lens to object distance = (focal length×object size) / imagesize
= 10×u/3u = 3.33
distance between image and object = 10 + 3.33 = 13.33cm
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