Question

Please help me to find the correct answer :)

Answer 1

Answer:

u = -80cm

v= 20cm

f= ?

1/f= 1/v-1/u

1/f= 1/20 + 1/80

1/f= 4/80+ 1/80

1/f= 5/80

f= 80/5

f= 16cm

HOPE U GOT IT

PLEASE MARK ME AS BRAINLIESTT

Answer 2

Answer:

16cm

Explanation:

distance of object (u)=80cm(-)

distance of image(v)=20cm(+)

1/f=1/v-1/u

=1/20-(-1/80)

=(4+1)/80

=5/80

f=80/5

=16cm