A real image of an object fom1ed by a converging lens of focal length 15cm is three times the size of the object. What is the distance of the object from the lens?
A
30cm
B
25cm
C
20cm
D
15cm
E
10cm
Verified Correct Answer: C.
Physical Principles & Numerical Solution
1/u + 1/3u = 1/15; u = 20cm
Source: Myschool Past Questions Archive (Record #24269)