Question

13.An object is kept at a distance of 60 cm from the lens gives a virtual 3
image at distance of 20 cm from the lens on the same side of the object
Find the focal length of lens and the size of the image if the size of the
object is 9cm​

Answer 1

focal length = -2cm

size of the image = 27cm

(I'm not sure it could be wrong)