Question

how are the distance of object distance of image focal length of lens related

Answer 1

1/v+1/u=1/f.
hope it will help you.
if it is right then mark as brainalist.

Answer 2

$\frac{1}{f} = \frac{1}{v} - \frac{1}{u}$
f = Focal distance
v = Image distance
u = Object distance