If the perimeter of the rectangle describe above is 60 m, what is its width?

20m 10m 30m none of these

The problem is that there is no "rectangle described above". We need that description to answer the question.

It could be all of the above. Because If 20 is the width, then the length would be 3. If the 10 is the width, then the length will be 6. If 30 is the width, then the length will be 2.

20 * 3 = 60

10 * 6 = 60

30 * 2 = 60