GMAT Problem Solving

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Source: Manhattan

Level: 3

Flying at constant speed, an airplane of type I (plane I) covers a certain distance between two points in 15 hours. An airplane of type II (plane II) covers the same distance in 10 hours. If plane I makes a landing after flying for 9 hours along the route, how many hours will it take plane II to complete the remainder of the route between the landing point of plane I and the destination?

  • A
  • B
  • C 2
  • D 3
  • E 4

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