Focal length f = 44 cm
Image distance v = ( 1/ 4) Object distance
                            =
u / 4
we know ( 1/ u ) + ( 1/ v ) = ( 1/ f)
               (
1/ u ) + ( 4/u ) = ( 1/f)
                5
/ u = 1/ f
From this distance of the object u = 5f
                                                       =
220 cm
(b). Image distance v = 55 cm
