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The image (of a real object) formed by a...

The image (of a real object) formed by a concave mirror is twice the size of the object. The focal length of the mirror is 20cm. The distance of the object from the mirror is:

A

`10 cm`

B

`30 cm`

C

`25 cm`

D

`15 cm`

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The correct Answer is:
A, B
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RESONANCE-GEOMATRICAL OPTICS -Exercise-2
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