In a flight of 600 km, an aircraft was slowed down due to bad weather. Its average speed for the trip was reduced by 200 km/hr and the time of flight increased by 30 minutes. The duration of the flight is:

- 1 hour
- 2 hours
- 3 hours
- 4 hours

**Answer**

Let the duration of flight be x hours.

Original Speed - New Speed = Reduced Speed

600/x - 600/(x + 1/2) = 200

600/x - 400/x = 200

x = 1

**The correct option is A.**