A hypermetropic person whose near point is at `100 cm` wants to read a book at `25 cm`. Find the nature and power of the lens needed.

Explanation

To find the nature and power of the lens needed for a hypermetropic person whose near point is at 100 cm and wants to read a book at 25 cm, we can follow these steps:

### Step 1: Understand the situation
The hypermetropic person can only see objects clearly at a distance of 100 cm (their near point). They want to read a book that is placed at 25 cm, which is closer than their near point. Therefore, they need a lens to help them see the book clearly.

### Step 2: Identify the object and image distances
- The object distance (u) is the distance of the book from the person, which is at 25 cm. Since the object is on the same side as the incoming light, we take this as negative:
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