Question

an object is kept at distance of 60 centimetres from the lens gives a virtual image at distance of 20 centimetres from the lens on the same side of the object find focal length of lens and the size of the image if the size of the object is 9 centimetre​

Answer 1

Answer:

focal length = -2cm

side of the image= 27cm

(I'm not sure it could be wrong)