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प्रश्न
David is observing his image in a plane mirror. The distance between the mirror and his image is 4 m. If he moves 1 m towards the mirror, then the distance between David and his image will be ______.
विकल्प
3 m
5 m
6 m
8 m
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उत्तर
David is observing his image in a plane mirror. The distance between the mirror and his image is 4 m. If he moves 1 m towards the mirror, then the distance between David and his image will be 6 m.
Explanation:
If David moves 1 m towards the mirror, then the distance between his image and mirror = 4 - 1 = 3m
So, the distance between David and the mirror = 3
Hence, distance between David and his image = 3 + 3 = 6m
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