Question

An object is placed in front of a concave mirror of focal length 30cm. The image is formed at a distance 45cm in front of the mirror. The distance of the object from the mirror is
a) 60cm
b) 30cm
c) 45cm
d) 15cm​

Answer 1

Answer:

-90cm

Explanation:

by mirror formula,

1/v+1/u=1/f

and here v= -45, f=-30

Now by putting these values in equation we get answer

= -90cm