Final answer:
The image will be formed 30 cm away from the pole on the same side as the object. It is calculated by using the mirror equation which shows the relationship between the object's distance, the image's distance, and the mirror's focal length.
Step-by-step explanation:
In optics, the relation between the object's distance (u), the image's distance (v), and the mirror's focal length (f) for a concave mirror is given by the mirror equation: 1/f = 1/v + 1/u. You're given that the focal length of the concave mirror is -15 cm (it's negative because for a concave mirror, the focus and the centre of curvature lie on the same side as light is incident, which is usually taken as the negative side), and the object's distance is -30 cm (negative as the object lies on the same side as light is incident).
By substituting these values into the mirror equation, we have: 1/-15 = 1/v + 1/-30. After solving for v, we find that v = -30 cm. So, the image will be formed 30 cm away from the pole, on the same side as the object.
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