Question

A concavelens has focal length of 20cm at what distancefrom the lens A is 5cm tall oblect B placed so thaf its forms and image at 15cm from the lens also calculate the size of the image formed​

Answer 1

Answer:

Object distance is 60cm from lens

Size of the image = 1.25cm

Explanation:--)

See attachment 1 for Ray diagram

And

Attachment 2 and 3 for solution

Answer 2

Answer:

See in attachment and Mark as brainleist