Help me with a question I didn't know how to answer!!

[Solimar]

My brother, who got his first job was asking me a question about hours, haha. Okay, so here is an example: say someone is working 2:30-6:30

He says it it five hours, counting like:

2:30, 3:30, 4:30, 5:30, 6:30

I say it is four hours, counting like:

2:30 - 3:30 = an hour

3:30 - 4:30 = an hour

4:30 - 5:30 = an hour

5:30 - 6:30 = an hour

so who is correct here? I want to give him an answer, I feel lame

Haha, thanks, ladies.

 

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