Lập kế hoạch & Dự toánCâu 406 / 521
If a receptacle takes 0.5 labor-hour to install, how many labor-hours should be estimated to install 30 receptacles?
a.30 hours
b.60 hours
c.15 hours
d.7.5 hours
Giải thích
Labor = 30 units × 0.5 hr = 15 labor-hours. Multiplying by 2 (60) or by the count alone (30) misapplies the labor unit, and 7.5 uses the wrong quantity.
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