[" biconvex lens of focal length "15cm" is,in front of a plane mirror.The distance "],[" e.mirror is "10em" .A small object is kept at a distance of "30cm" from the lens.Th "],[" Virtual and at a distance of "16cm" from mirror "],[" Real and at distance of "16cm" from the mirror "],[" Virtual and at a distance of "20cm" form the mirror "],[" leal and at a distance of "20cm" from the mirror "]