It depends on whether you view this as a problem in math or a question about real-world performance. Since there is no information given about real-world factors such as those you mention, whose relevance would depend on the materials and construction techniques used, the available tools and equipment and skill level of the worker(s), the length and duration of breaks, and so on, it’s reasonable to treat this as a textbook math question.
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BTW, as @Chronos already noted, Bing is notoriously argumentative and I knew from reading the OP that it was Bing Chat (or something like it) and not ChatGPT which is invariably polite.
But ChatGPT can be creatively insulting if you guide it the right way. Its response here when I asked it to make up something that Don Rickles might say to a member of the audience was not great, but not really terrible, either! … 
Well, look at this guy over here! Plaid shirt, balding, and thick glasses – you’re the full package, my friend. I haven’t seen a fashion statement like that since my grandma tried to knit a sweater for a porcupine. And hey, nice try with the glasses, but I think you’re still missing the point – they’re supposed to help you see, not scare away small children!
But seriously, folks, give it up for Mr. Plaid and his lovely wife. She must be a saint, putting up with a guy who looks like he combs his hair with a pork chop. I haven’t seen a love like this since my dog found a new chew toy. Keep it up, you crazy kids!