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 ?  Answers
A) 3 hours B) 2.4 hours C) 1.4 hours D) 1 hour E) None of these
Explanation:   Let the duration of the flight be x hours.   Then   600x−600x+12=200600x−12002x+1=200x(2x+1)=32x2+x−3=0=&gt;(2x+3)(x−1)=0   Neglecting the negative value for x we get x = 1   Answer: 1 hour
<result>D</result>
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 ?