A convex lens has a focal length of 30 cm. Calculate at what distance – McqOptions

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1.	A convex lens has a focal length of 30 cm. Calculate at what distance should the object be placed from the lens so that it forms an image at 60 cm on the other side of the lens?
A.	25cm
B.	60cm
C.	30cm
D.	None of these
Answer» C. 30cm

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