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Maths Puzzle
Numerical Ability
With the wind, an airplane travels 2200 miles in 4 hours. Against the wind, it takes 5 hours to travel 2350 miles. Find the rate of the plane in still air.
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book Other Question
5x^-15x^3-25x-10 need to find out how to set this problem?
Please help!!
x=1+6 sqrt x-9
Thank you!