Question

find the position of the image formed
f=10
h=15
distance (u)=-25
use the formula of​

Answer 1

for convex lens:

v=uf/u+f =-15*10/-15+10= -150/-5= 30cm

for concave lens :

u=30-25=5 cm

v=uf/u+f =5(-10)/5+(-10)=-50/-5=10cm

so final image is formed 10 cm to the right of concave lens.