Question

13. An object is placed in front of a convex lens of focal length 50 cm and con-
cave lens as shown below. Find the focal length of concave lens if the image
on the convex lens is formed at 80 cm from it.
+ 30 cm →
123.3
-
(a) 15 cm
(c) 45 cm
(b) 30 cm
(d) 60 cm​

Answer 1

option b is correct answer

Answer 2

Hey mate

Here is your answer -

30 cm