An object 4.0 cm in size, is placed 25.0 cm in front of a concave mirror of focal length 15.0 cm.
Find the size of the image.

Explanation

To find the size of the image formed by a concave mirror, we will use the mirror formula and the magnification formula. Here’s the step-by-step solution:

### Step 1: Identify the given values
- Size of the object (HO) = 4.0 cm (positive as per sign convention)
- Object distance (U) = -25.0 cm (negative because the object is in front of the mirror)
- Focal length (F) = -15.0 cm (negative for concave mirrors)

### Step 2: Use the mirror formula
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