medium · GMAT Quant
Two automated quality control cameras, Cam A and Cam B, inspect parts. Cam A can inspect a tray in 15 seconds, and Cam B can inspect it in 20 seconds.
If they both work on the same tray simultaneously, but Cam B is only active for the first 5 seconds, how many total seconds are required to finish the tray?
- 11.25
- 8.57
- 6.25
- 13.75
- 15.00
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