The distance from Sydney to Cairns by air is about 2000km. Qantas use a Boeing plane with a maximum speed of 800km/h on this route, and the journey takes 3 hours.
After 2 hours from Sydney, the plane has travelled 1400km. Calculate the speed of the plane for the last part of the journey.

Question

The distance from Sydney to Cairns by air is about 2000km. Qantas use a Boeing plane with a maximum speed of 800km/h on this route, and the journey takes 3 hours.
After 2 hours from Sydney, the plane has travelled 1400km. Calculate the speed of the plane for the last part of the journey.

campbell_st · Answer

well the plane has 600km to travel in 1 hour...

anonymous · Answer

so 600km/h

anonymous · Answer

It should be that the plane travels 600km for the last hour bcos 2000km minus 1400km is 600km

anonymous · Answer

thanx

anonymous · Answer

Why the plane has traveled 2 hours and has achieved the distance of 1400km
there are 3 hours and 2000km total in the flight 
3-2= 1 hour left 
2000km-1400km= 600km

anonymous · Answer

thanx u guys