The given figure shows image formation by a lens. Analyse the figure and answer the following questions: B' ( 1 2 Lens B A' A (a) What is the type of lens used for image formation in the given ray diagram? (b) If the real image is formed at a distance of 30 cm from the lens and the size of image is twice the size of the object, then where was the object placed? A X Y Z ( 2 2 3 3 3 B