Question

A convex lens produce an inverted image magnified three time of an object placed at a distance of 15cm from.it .calculate the focal lenght of the lens

Answer 1

M=3

U= -15

M=v/u

3=v/-15

V= -45

1/f=1/v+1/u

1/f=1/-45+1/-15

1/f= -1+3/45

1/f=2/45

F=45/2

Answer 2

hope this is the Nswer