Question 1071034
The wording should be 180 square feet of carpet.
I would write it as 180 ft2
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The width and length are "linear" dimensions and
they are expressed as:
width = 9 ft
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Let {{{ L }}} = the length in feet
{{{ 9*L = 180 }}} ft2
{{{ L = 20 }}} ft
So this is a linear dimension just like width.
It never hurts to write down ALL the dimensions involved
in a problem just to keep them straight