medium · GMAT Quant
A manufacturing plant operates two automated inspection lines, Line A and Line B. Line A inspects 15 units per hour, while Line B inspects 22 units per hour. On a given shift, Line A operated for a hours and Line B operated for b hours, inspecting a total of 326 units during 18 total machine-hours of operation.
What is the value of a^2 - b^2?
- 2
- 18
- 36
- 64
- 164
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