Labor productivity is calculated as the amount of output produced per unit of labor hour. To compare the options, we'll calculate the labor productivity for each scenario:
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Five toy cars in 2.5 labor hours: \[ \text{Productivity} = \frac{5 \text{ cars}}{2.5 \text{ hours}} = 2 \text{ cars/hour} \]
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Twenty toy cars in four hours: \[ \text{Productivity} = \frac{20 \text{ cars}}{4 \text{ hours}} = 5 \text{ cars/hour} \]
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Five toy cars in two hours: \[ \text{Productivity} = \frac{5 \text{ cars}}{2 \text{ hours}} = 2.5 \text{ cars/hour} \]
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Ten toy cars in ten labor hours: \[ \text{Productivity} = \frac{10 \text{ cars}}{10 \text{ hours}} = 1 \text{ car/hour} \]
Now, let's compare the productivity values:
- 2 cars/hour
- 5 cars/hour
- 2.5 cars/hour
- 1 car/hour
The option with the greatest labor productivity is the production of 20 toy cars in four hours at 5 cars/hour.