WORK – activity involving mental or physical effort done in order to achieve a purpose or result.
I looked up the definition in Google and found the above.
What is Your Purpose? What Result Do You Want?
Depending on what your answers are to the two questions above, work can mean very different things.
If you hate your job then you probably only want to work there four hours per week, if that.
If the given purpose is to clean the garage, then yes you want the amount of time you spend on it to be as short as possible, or even better pay someone else to do it for you.
In both of these cases, you want to reduce the number of hours spent to avoid it or be more productive with your time.