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What is the correct answer?
4
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. What is the duration of the flight ?
A.
3 hours
B.
2.4 hours
C.
1.4 hours
D.
1 hour
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