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:	Choose the correct choice from the following.
A) 1hour
B) 2hour
C) 3hour
D) 4hour
E) 5hour
Let the duration of the flight be x hours   Then 600/x - 600/x (1/2) = 200   = 600/x - 1200/2x+1 =200   =x(2x+1) =3   (2 +1)= 
<gadget id="calculator">(2 +1)</gadget>
<output>3</output>
3=2xsquare + x -3 = 0   =(2x+3)(x-1) = 0   = x= 1 hr ( neglecting the -ve value of x)   1hournswer: Option 1hour
<result>A</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. The duration of the flight is: