What is the width and length of 150 square meters?

There is no way to answer the question.

10 metres * 15 metres,

1 metre * 150 metres,

0.1 metre * 1500 metres,

0.01 metres * 15000 metres, and so on.

or

7.5 metres * 20 metres,

0.75 metres * 200 metres, etc.