Question

Graph of position of image versus
position of point object from a convex
lens is shown. Find focal length of the
lens with possible error.
31
v cm
30
10
u cm -31 -30
-20
-10
0 (-9, +9)​

Answer 1

Answer:

10

Explanation:

15 thank + follow = inbox

Answer 2

Answer:

$\huge\red{10}$