DIRECTION for the question: Solve the following question and mark the best possible option.

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:

A

3 hours

B

2 hours

C

1 hours

D

4 hours

E

5 hours