An image four times the size of an object is formed when the object is kept in front of a concave mirror of focal length 25 cm. Find the two possible distance of the object from the mirror.

Explanation

To solve the problem of finding the two possible distances of the object from a concave mirror that forms an image four times the size of the object, we can follow these steps:

### Step 1: Understand the Given Information
- Focal length (F) of the concave mirror = -25 cm (negative because it is a concave mirror).
- Magnification (M) = 4 (the image is four times the size of the object).

### Step 2: Write the Magnification Formula
The magnification (M) for mirrors is given by:
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