A concave mirror produces three times (enlarged) magnified real image of an object placed at l0 cm in front of it. Where is the image located?

Question

A concave mirror produces three times (enlarged) magnified real image of an object placed at 10 cm in front of it. Where is the image located?

Answer 1

Here, in case of concave mirror
u=10 cm [u, is always negative]
v =?;m = - 3 [real image]
Now the magnification formula is
m= -v/u or -3= -(v/-10)
or , v = -30 cm.
Image will be formed at 30 cm from the mirror on the same side of the object.