In a flight of 2800km, an aircraft was slowed down due to bad weather. Its average speed is reduced by 100km per hour and time increases by 30 min. Find the original duration of the flight.
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Answer:
2800 km = time =?
100 km = 30 mintues
1000 km = 30x10= 300 minutes
2000km =30x20= 600 minutes
2800km=30x28=840 minutes
so,the orginak duaration of flight is 840 mintues
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