A room measures 12 feet by 15 feet and requires VCT flooring. The tiles are 12"×12" and cost $2.50 each. Including 10% waste, what is the material cost?
Correct Answer
B) $495.00
Room area = 12' × 15' = 180 sq ft. Each 12"×12" tile = 1 sq ft. Need 180 tiles + 10% waste (18 tiles) = 198 tiles total. Cost = 198 × $2.50 = $495.00.
Why This Is the Correct Answer
The calculation correctly determines the room area (180 sq ft), recognizes that 12"×12" tiles equal 1 sq ft each, adds the required 10% waste factor (18 additional tiles), and multiplies the total quantity (198 tiles) by the unit cost ($2.50) to arrive at $495.00. This systematic approach accounts for all variables in the problem including the critical waste allowance that contractors must include in material estimates.
Why the Other Options Are Wrong
Option A: $450.00
This appears to be a calculation error, possibly adding 20% waste instead of 10%, or miscalculating the tile quantity needed for the space.
Option D: $594.00
This represents an excessive waste calculation, possibly using 18% or 20% waste factor instead of the specified 10%, resulting in an overestimate of required materials.
Memory Technique
Remember 'AWM' - Area, Waste, Multiply. Always calculate the base area first, add your waste percentage, then multiply by unit cost. For 12"×12" tiles, each tile = 1 sq ft makes the math simple.
Reference Hint
Florida Building Code Chapter 7 - Interior Finishes, or construction estimating references covering flooring material calculations and waste factors.
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