Question

A concave lens produces 3times the maginified real image of an object placed at 10cm in front of it where is the image located

Answer 1

here linear magnification, m = -3
(negative sign for real image which is inverted )
object distance, u = -10 cm
image distance, v= ?
as
m= -v/u
-3 = -v/-10
v = -30 cm
the image is located at 30 cm in front of the mirror.