Final answer:
The magnification of this lens is 1.
Step-by-step explanation:
The magnification of a lens can be calculated using the formula:
magnification = distance of the image from the lens / distance of the object from the lens
In this case, the image is formed 10 cm on the opposite side of the lens from the object, which is 10 cm away. The magnification can be calculated as follows:
magnification = 10 cm / 10 cm = 1
Therefore, the magnification of this lens is 1.