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A small aeroplane can travel at 400kmph in still air . The wind is blowing at a constant speed of 40kmph . The total time for a journey against the wind is 120min. What will be the time in minutes for the return journey with the wind?

98.18min.

220min.

114min.

80min.

Explanation:

Solution:
400 – 40 = 360 kmph
Let distance be x km
Take time in hours
=> 120/60 = x/360
=> x = 720 km
Speed of aeroplane with the wind = 440 kmph
Therefore ,
Time taken by aeroplane with the wind = (720/440 ) * 60 = 98.18 min.

By: Pranav Gupta

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