Machine X runs at a constant rate and produces a lot

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Machine X runs at a constant rate and produces a lot consisting of 100 cans in 2 hours. How much less time would it take to produce the lot of cans if both Machines X and Y were run simultaneously?

1) Both Machines X and Y produce the same number of cans per hour.
2) It takes Machine X twice as long to produce the lot of cans as it takes Machines X and Y running simultaneously to produce the lot.

The OA is D

Source: Official Guide
Source: — Data Sufficiency |