What is the range of temperature which can be achieved in a box-type solar cooker in two to three hours?

The range of temperature which can be achieved in a box-type solar cooker in two to three hours is 100°C to 140°C.  

Extra information with the image is posted for reference only.

A box-type solar cooker is the most commonly used form of solar cooker, that can achieve a temperature of 100°C to 140°C  in two to three hours.  

It consists of the following components:

1. Black Box.

2. Glass Cover.

3. Plane Mirror reflector.

4. Cooking Containers.