For convex lens
Using lens formula
h1 = 4 cm
So magnification, m = h2/h1 = v/u
h2= (v/u) x h1
= (-48/-16) x 4
= 12 cm
Position of image is formed at a distance of 48 cm on the same side of the object. It is indicated by the negative sign
The size of image is three times the size of object i.e., 12 cm.
The image is virtual and erect.