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A word question for you math scholars.
O.K., I am posting a math question where I disagree with the answer. Here is the question:
An aircraft with a constant speed in still air travels 4200 km with a constant tailwind in 3 hours. With the same wind now against the aircraft, it takes 4 hours to make the return trip. What was the speed of the plane, in km/hr?
A. 875
B. 125
C. 1225
D. 175
E. None of these
I am being told that the tailwind/headwind needs to be factored into the equation to make it a problem with two variables (a systems problem). I disagree since the tailwind is the exact opposite of the headwind it should cancel itself out.
To me (I am not a math guru) the answer should be 1050km/hr which would make the answer to the above problem "E".
My answer is wrong. Any suggestions?
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