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November 22, 2014

November 22, 2014

Posted by **please help me out!!!!** on Thursday, February 14, 2013 at 11:29pm.

When the distance between the hole and floor is h1=20 cm, the image's length is l1=20 cm; when the distance between the hole and floor is h2=33.333 cm, the image's length is l2=36 cm . What is the length L of the ceiling lamp in meters?

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