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 ?

3 hours

2.4 hours

1.4 hours

1 hour

$x\left(2x+1\right)=3$
$2{x}^{2}+x-3=0$