1.

If 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 original duration of the flight is: 1. 1 hour 2. 2 hours 3. 3 hours 4. 4 hours

Answer»

Correct option is 1. 1 hour 

Speed equation

\(\frac{600}{t}-\frac{600}{t+\frac12}= 400\)

By hit and trial method 

T = 1 hour



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