Jammy took a 600 m-long flight. Because of bad weather in between the journey, the aircraft was slowed down. The average speed for the journey was decreased by 200 km/hr and the time of flight increased by 30 minutes. What would be the duration of the flight?

Let the original duration be t hours and the original speed be v km/hr, making the distance 600 km, so v equals 600 divided by t. The new speed is v minus 200 and the new time is t plus 0.5, giving the equation 600 divided by (v minus 200) equals t plus 0.5. Substituting v equals 600 divided by t and solving gives t equals 1 hour.

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