A convex lens of focal length 20 cm is placed coaxially with a convex mirror of radius of curvature 20 cm.

Applying lens formula for convex lens,

1v-1u=1f

⇒ 1v-1-60=120

⇒ v=30cm

Image (I₁) formed by the convex lens acts as an object for the convex mirror.

Since the mirror and lens are separated by 15 cm, the distance between I₁ and mirror is 15 cm. Therefore,  object from mirror becomes u'=15cm

Applying mirror formula for convex mirror,

1v'+1u'=1f'

⇒ 1v'+115=2R   (focal length of mirror, f' =R2)

⇒1v'+115=110

⇒ v'=30cm

Hence, the image is formed 30 cm right of the convex mirror

Nature of the image is virtual.

Position of the image is 30 cm right of the convex mirror.