• If you encounter a question like this, it will usually tell you that there are x number of bricks per y area or a starting point similar  to this. You can then use this to calculate the number of bricks needed and then the cost/SF or whatever the question is asking. Usually wall width isn't taken into account.

• yeah. so can i ask you for a “twist”?
i found some of these more than a tad counter intuitive.
for /averaging/ something you add up the square foot of A plus the square foot of B and you divide by the total square feet (like resistance or U or acoustics i guess).
but brick cost (or material cost) is provided in #\sf? and a TOTAL square foot is given? this would be too straightforward wouldn’t it? is there a “twist” that can be added?
maybe the problem was the /answers/ that were provided weren’t in the units you needed...?

• hmmm. so if it is as you suggest - but you are not given the cost/SF in 1SF or 100SF (as you would with roofing material) - you just divide the cost/SF by whatever random SF you are given to get \$1/SF i guess...?

• To answer your first question, usually the twist is that you are comparing it to a different material-as in is it cheaper to build this wall in brick or stone given costs/SF for the two materials and the dimensions of a wall. Something like that.
Oftentimes they will test your reading comprehension skills (for lack of a better word) by giving you the costs in say yards but the areas in SF.
To answer your second question, yup that’s how you would get \$/SF.
Did that help explain it or did I make it more confusing?

• thanks as always kirsten. awesome help and thanks for hanging in there on this one. some of these are hard to remember what was confusing because i don’t ever remember having to think of things like this.
that said, i’m pretty sure the problem - more generically - is you don’t see things in normal units. for instance you don’t see materials in square feet or in 100SF so you have to convert them to make any sense of it.