Respuesta :

   If he has 20 2\3 and you add a 1 under 4 then you get 20 2\3 divided by 4\1.
Multiply 2\3 and 4\1 and you get 12\2, then simplify and that's 6. multiply 6 times 20 and you get 120.

Answer:

Each piece of lumber is 4 5/12 feet long.

Step-by-step explanation:

To find the length of each piece of lumber, divide the total by 4.