Object distance (u) = – 20 cm
Image distance (v) = ?
Object height (h) = 5 cm
Image height (h’) =?
Radius of curvature (R) = 30 cm
Radius of curvature = 2 × Focal length
R = 2f
f = 15 cm
The positive value of image height indicates that the image formed is erect.
Hence, the image formed is erect, virtual, and smaller in size.
Ray diagram