Question

Example 2. An object is placed at a distance of
12 cm in front of a concave mirror. It forms a real
image four times larger than the object. Calculate the
distance of image from the mirror.
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Answer 1

hope this helps u

m= -v/u     -4 as real image

u= -12 cm

sub the values

-4 = -v/ - 12 -/- cancelled

-4=v/12

-4*12 = v

v= -48 cm.