**Question:**Cities A and B are in different time zones. A is located 3000 km east of B. The table below describes the schedule of an airline operating non-stop flights between A and B. All the times indicated are local and on the same day.

Departure | Arrival | ||

City | Time | City | Time |

B | 8:00 am | A | 3:00 pm |

A | 4:00 pm | B | 8:00 pm |

Assume that planes cruise at the same speed in both directions. However, the effective speed is influenced by a steady wind blowing from east to west at 50 km per hour.

What is the time difference between A and B?

- 1 hour and 30 minutes
- 2 hours
- 2 hours and 30 minutes
- 1 hour
- Cannot be determined

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