Not to sound condescending, but use a little common sense here. Even people that work 40 hours a week aren't on task 100% of the time.
In a given day I'll take a couple coffee breaks, maybe go outside for a couple breaths of fresh air, and use the restroom at least twice, in addition to my lunch hour.
That said - those 40 hours that I am in the office aren't hours I am free to use however I please, so it is customary to say that you work 40 hours a week, not 35.8 hours per week, etc.
It's not hard to conceive of a situation where it just works out to be easier to be in the office every waking hour, particularly working on startups. This doesn't mean you don't stop to watch a funny youtube clip or set up a good music playlist- it just means its time fenced off from any other major commitments.
In a given day I'll take a couple coffee breaks, maybe go outside for a couple breaths of fresh air, and use the restroom at least twice, in addition to my lunch hour.
That said - those 40 hours that I am in the office aren't hours I am free to use however I please, so it is customary to say that you work 40 hours a week, not 35.8 hours per week, etc.
It's not hard to conceive of a situation where it just works out to be easier to be in the office every waking hour, particularly working on startups. This doesn't mean you don't stop to watch a funny youtube clip or set up a good music playlist- it just means its time fenced off from any other major commitments.