The image of a candle flame formed by a lens is obtained on a screen placed on the other side of the lens. If the image is three times the size of the flame and the distance between lens and image is `80 cm,` at what distance should the candle be placed from the lens ? What is the nature of the image at a distance of `80 cm` from the lens ?

Explanation

To solve the problem step by step, we will use the lens formula and the magnification formula.

### Step 1: Identify the given values
- The distance between the lens and the image (V) = +80 cm (positive because the image is on the opposite side of the lens)
- The magnification (M) = 3 (the image is three times the size of the flame)

### Step 2: Use the magnification formula
The magnification (M) for a lens is given by the formula:
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