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Grade: 12
        
Did not understood the last calculation and last sign convention .. plz explain me sir 
 
one year ago

Answers : (1)

Deepak Kumar Shringi
askIITians Faculty
4394 Points
							1/v=1/15+1/60
=5/60
=1/12
so v=12
as its is positive it will be left side of mirror
one year ago
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