A crew installs 420 linear ft of layout control in 7 hours. What average production rate did the crew achieve?
Correct Answer
B) 60 linear ft/hr
The average production rate is 420 linear ft / 7 hr = 60 linear ft/hr.
Why This Is the Correct Answer
The average production rate is 420 linear ft / 7 hr = 60 linear ft/hr.
Why the Other Options Are Wrong
Option A: 48 linear ft/hr
crew productivity rate, choice a: 48 linear ft/hr backs into 6.86 when divided by 7; the accepted setup gives 8.57 on that same base.
Option C: 70 linear ft/hr
crew productivity rate, choice c: 70 linear ft/hr backs into 10 when divided by 7; the accepted setup gives 8.57 on that same base.
Option D: 2,940 linear ft/hr
crew productivity rate, choice d: 2,940 linear ft/hr equals 420 x 7. That multiplies those two listed numbers.
Memory Technique
Say the crew productivity rate rule aloud as a chain; the chain ends at 60 linear ft/hr, not an intermediate stop.
Reference Hint
Open Construction Jobsite Management, 5th Ed. (2024); use by topic index - labor hours / productivity / earned value / job cost to confirm that The average production rate is 420 linear ft / 7 hr = 60 linear ft/hr.
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