Question

43. A convex lens has a focal length of 20cm. It is used to form an image of an
object placed 15cm from lens. The image is:​

Answer 1

hope this helps u

given :-

f = 20 cm

u = -15 cm

v = ?

to find

v

solution

1/f = 1/v+1/u

1/v = 1/f - 1/u

     =  1/20 - (-1/ 15)

        = 1/20+1/15                 lcm of 15,20 = 60

       = 3/60 + 4/60

          = 7/60

60/7v = 0

v = 60/7

v= 8.571cm

plz mark as brainlist answer

plz