SOLUTION: Bradley flies a plane against a headwind for 2501 miles. The return trip with the wind took 20 hours less time. If the wind speed is 10 mph, how fast does Bradley fly the plane wh

Algebra ->  Quadratic Equations and Parabolas  -> Quadratic Equations Lessons -> SOLUTION: Bradley flies a plane against a headwind for 2501 miles. The return trip with the wind took 20 hours less time. If the wind speed is 10 mph, how fast does Bradley fly the plane wh      Log On


   

Question 1027882: Bradley flies a plane against a headwind for 2501 miles. The return trip with the wind took 20 hours less time. If the wind speed is 10 mph, how fast does Bradley fly the plane when there is no wind?
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
RT=D Basic Travel Rates Rule. 

                RATE            TIME             DISTANCE

AGAINST         r-10            t                 2501

WITH W          r+10            t-20              2501

Form and solve the system of equations. Main interest is to find the value of r.