A corridor needs resilient base on two 84-ft walls. How many linear feet of base are required before waste?
Correct Answer
D) 168 linear ft
Base length is 84 ft x 2 walls = 168 linear ft.
Why This Is the Correct Answer
Base length is 84 ft x 2 walls = 168 linear ft.
Why the Other Options Are Wrong
Option A: 84 linear ft
resilient base length, choice a: 84 gives 84 linear ft. That calculation copies a listed value without completing the operation.
Option B: 126 linear ft
resilient base length, choice b: 126 linear ft omits a required add-on/subtraction; the numeric gap is 42.
Option C: 336 linear ft
resilient base length, choice d: 336 linear ft is off by 168 from the checked result 168 linear ft because it misuses the 168 item (84 ft x 2 walls = 168 linear ft).
Memory Technique
Picture a ledger line labeled resilient base length: finish every operation before accepting 168 linear ft.
Reference Hint
Open Principles and Practices of Commercial Construction, 11th Ed., 2024; use by topic index - acoustical ceilings / paint / tile / resilient base to confirm that Base length is 84 ft x 2 walls = 168 linear ft.
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