Question

hi friends
what is the position of the image when an object is placed at a distance of 20 cm from a concave mirror of focal length 20 cm ​

Answer 1

sol-

1/f=1/v+1/u

1/20=1/4v+1/v

1/20=5/4v

4v=100

v=25cm

u=100cm

Answer 2

Answer:

, hundred is the correct answer