Your customer wants to build a wall that is 12' long. How many 2 x 4's would be required if spaced every 16" on center

Question

I just need to find out the answer to this problem.  I just need you to go step by step to this word problem.

Answer 1

“spaced every 16" on center“ means that it is 16” from the center of one board to the center of the next one.

12’ = 144”   [12 feet = 144 inches]

 

Let’s try to draw the wall:

 

0         16       32        48       64       80         96      112     128     144

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Now, the math solution is:

 

A 2”x4” is placed at position 0 (start at the corner).  Then there are 144”/16” = 9 more.  Total 10.

 

Or, you could have 144”/16” = 9 sets of 2”x4” with 16” space after each.  Then, put one at the end.  Total 10.

 

Answer 2

12' = 432"

432" / 16" = 27

And then you want at the end.

28