Bob works exactly 8 hours per day assembling widgets at a constant rate. How many widgets can he assemble in half of a

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Bob works exactly 8 hours per day assembling widgets at a constant rate. How many widgets can he assemble in half of a workday?

(1) Bob produces 20 widgets in a full workday.

(2) Bob produces 50 widgets in 20 hours.

[spoiler]OA=D[/spoiler]

Source: Manhattan GMAT
Source: — Data Sufficiency |