Radius of curvature (R) = 30 cm
f=R2=302=15 cm
Focal distance for concave mirror, f=−15 cm
Object distance, u=−20 cm
Height of the object, ho=5 cm
According to mirror formula,
1v+1u=1f
1v=1f−1u
1v=1−15+120=−4+360=−160
Image distance,v=−601=− 60 cm
Image is real , inverted and in front of the mirror.
m = hih0=−vu
hi5=60−20
hi=−15 cm
Image formed is inverted as size comes out to be negative.
Image is real as it is forming in front of the mirror.
Size of image is 15 cm.