Solve the given questions:
Question 1: If a lens has a focal length of 10cm where the object should be located so as to produce a real image that is 20 times larger than the object?
Question 2: For a lens of focal length f, where should the object be located to produce a real image that is the same size as the object itself?
Show how you get the answer, so that I can better understand how to do it.