Standing 2.5 m in front of a small vertical mirror you see thereflection of your belt buckle, which is 0.70 m below your eyes. If you remain 2.5 m from the mirror but climb onto a stool, howhigh must the stool be to allow you to see your knees in the mirror? Assume that your knees are 1.2 m below your eyes.
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a person able to see his belt due to reflection by mirror, which is just 0.70 m below the eyes and wish to see his knee which is 0.50m lower from belt. in order to observe his knee using a stool increased the knee height to the position of belt that is 0.50m.
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