Haley and Samuel can each make one gift box in two hours. Rachael takes three hours to make the gift box alone. If Haley, Samuel, and Rachael work together, how long will it take them to make one gift box?

I think if those three work together to make one gift box it should take them one hour. I would say this because three of them working together should cut it down by a good 2/3's. Ergo 1 hour. Have a good day