OA is an object with size 4 cm and O'A' is the image of the object. Find the image height and nature of the image formed.
2cm, inverted
Magnification = vu = hih where v and u are the image and object distance.
⇒ +15−30 = hi(4)
h′ = −42 = - 2 cm
Image height is 2 cm and inverted.