Well Well Well...You and my other contractor

buddy are correct. However according to the Great state

of Florida Your a failure...lol

You see My dear fritz your way is the way some or most of

us contractors figure slabs when we pour them. BUT...

as Im sure my contractor buddy can attest to when taking these exams

testing requirements dictate the

exact amount be the correct answer..no overages or field smarts or

even common since thinking allowed

and thus because of this (exact amount) requirement

your answer is wrong... Your answer would have been included

in the multiple choice to throw you off.

The correct answer is

Length in feet x Width in feet x Depth in inches (which equals cubic yards) divided by 27 = total yds.

100' x 16' x 4'' convert inches to to decimal (4/12=.33) /27 = total yards

100' x 16 x .33 / 27 = 19.56 total yds.  I would order 20 plus... Im wasteful  lol