GMAT Problem Solving
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Source: GWD
Level: 0
Pat, Kate, and Mark charged a total of 162 hours to a certain project. If Pat charged twice as much time to the project as Kate and 1/3 as much time as Mark, how many more hours did Mark charge to the project than Kate?
- A 18
- B 36
- C 72
- D 90
- E 108