Question

concave mirror produces three times magnified and last real image of a of an object placed at 10 cm in front of it where is image located

Answer 1

m= -3 (real image)

u =-10cm

m = -v/u

v = -m * u

v = - (-3) * (-10) = -30 cm

image is at 30cm in front of mirror.

Answer 2

magnification(m) = -3 (as image is real)
object distance(u)  = -10cm
image distance (v)=?

we know that   m= -v/u

-3 =  -v /-10

-3 = v/10
 
v =-3 * 10

v = - 30 cm