Question

an object is kept on the principal axis of a convex lens of focal length 10 centimetre at a distance of 10 centimetre from the pole the object start moving at velocity 20 mm/second towards the mirror at an angle 30° with the principal Axis what will be the speed of its image and direction with the principal Axis at that instante​

Answer 1

I don't know hahaha hahaha haha ha ha ha ha ha ha ha