Given
#f="The focal length of convex mirror"= 20 cm#
#u="Object distance"=-6m=-600 cm#
#v="Image distance"=?#
#h_o="Height of the object"1.6m#
#w_o="Width of the object"=2m#
#color(blue)("The Mirror Formula":#
#color(red)(1/v+1/u=1/f)#
#=>1/v-1/600=1/20#
#=>1/v=1/20+1/600=31/600#
#=>v=600/31~~20cm#
#m="Magnification"=-v/u=1/31#
So
#h_i="Height of the image"=mxxh_o=160/31cm#
#h_i="Width of the image"=mxxw_o=200/31cm#
So the image of the car will be seen #~~20 cm# behind the mirror and its height will be #160/31cm# and its width will be #200/31cm#