Focal length, f=15cm
Object distance, u=−10cm
According to mirror formula,
1f=1v+1u
1v=115+110
1v=530=16
v=+6 cm
The image is formed 6 cm behind the mirror.
Magnification, m=−vu=−6−10=0.6
The positive value of magnification indicates the image is a virtual, erect and magnified image.