A hotel elevation has 11 identical punched windows per floor for 6 floors. The owner adds 5 percent attic stock for future replacement. What window count should be ordered?
Correct Answer
A) 70 windows
Base count is 11 x 6 = 66 windows. Adding 5 percent gives 66 x 1.05 = 69.3, rounded up to 70 windows. Other choices omit attic stock, round down, or use a larger allowance.
Why This Is the Correct Answer
Base count is 11 x 6 = 66 windows. Adding 5 percent gives 66 x 1.05 = 69.3, rounded up to 70 windows. Other choices omit attic stock, round down, or use a larger allowance.
Why the Other Options Are Wrong
Option B: 66 windows
window count, choice a: the answer choice lifts 66 windows from the working line Base count is 11 x 6 = 66 windows.
Option C: 69 windows
window count, choice b: 69 windows rounds the 69.3 result down; the accepted path rounds/carries it to 70 in.
Option D: 72 windows
window count, choice d: 72 windows implies about 9.09 percent added to 66; the stated add-on is 5 percent in.
Memory Technique
Remember window count as "base, adjustment, final unit"; the last unit should read 70 windows.
Reference Hint
Open Principles and Practices of Commercial Construction, 11th Ed., 2024; use the index entry or section for "Window unit quantity takeoff" to confirm that Base count is 11 x 6 = 66 windows.
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