Answer:

Step-by-step explanation:
Newton meter is the product of Newton and meter. Newton is the unit of force and meter is the unit of distance. And product of force and distance gives work. Hence Newton meter is the unit of work.
Both Newton and meter are SI of force and distance respectively. Th SI unit of Joule is also known as Joule (J). Which means, 1 N-m = 1 J (Joule).