question: An airplane has a speed of 250km/hour. One day it flies 990 kms with a tailwind, and then returns against the wind. The total trip-time is 8 hours. Find the velocity of the wind (assume it is constant).
I honestly just completely dont get this question, i dont find that the wind speed has any relevance to the question since going with and against the wind speed would just cancel itself out :S
Any help is greatly appreciated