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1. Why do we prefer a convex mirror as a rear-view mirror in vehicles?
 
The mirror that can give an erect and enlarged image of an object is .
 
2. Why do we prefer a convex mirror as a rear-view mirror in vehicles?
 
A convex mirror is used as a side/rear-view mirror of a vehicle because,
 
It always forms an  image of an object placed anywhere in front it
 
It has a  than a plane mirror of the same size