The Time Taken by the Plane to Cover 9000 km is :

A plane can cover 6000 km in 8 hours. If the speed is increased by 250 kmph, then the time taken by the plane to cover 9000 km is

  1. 5 hours
  2. 8 hours
  3. 6 hours
  4. 9 hours
Anurag Mishra Professor Asked on 7th October 2015 in Maths.
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1 Answer(s)

Answer: (4) 9 hours

Explanation:-
A plane can cover 600 km = 8 hours
Then, the Speed of a plane = 6000/8             (Speed = distance/time)
= 750 km/hr

If the speed increased by 250 km/hr
Then, the speed of a plane = 750 + 250 = 1000 km/hr

Time taken by plane to cover 9000 km = 9000/1000
= 9 hrs

Then, the time taken by plane to cover 9000 km is 9 hrs.

Hence, the answer is (4) 9 hrs.

Anurag Mishra Professor Answered on 7th October 2015.
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