Focal length of Concave mirror = -30cm (focal length of concave mirror is negative)
Distance of object from mirror = -20 cm (since object is on the left-hand side of lens and acc. To our sign convention)
Distance of image from mirror = ?
Using Mirror formula
V = 60 cm
Hence the image is at a distance of 60cm from mirror and is virtual.
Using magnification formula
M = 3
Hence, the image is 3 times the object and is erect.
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