SOLUTION: An Airplane flew for 4 hours against headwind of 40 km/h. On the
return flight the same wind was now a tail wind, and the flight took 3
hours. Find the speed of the airplane in
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-> SOLUTION: An Airplane flew for 4 hours against headwind of 40 km/h. On the
return flight the same wind was now a tail wind, and the flight took 3
hours. Find the speed of the airplane in
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Question 186418: An Airplane flew for 4 hours against headwind of 40 km/h. On the
return flight the same wind was now a tail wind, and the flight took 3
hours. Find the speed of the airplane in still air Found 2 solutions by stanbon, josmiceli:Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! An Airplane flew for 4 hours against headwind of 40 km/h. On the
return flight the same wind was now a tail wind, and the flight took 3
hours. Find the speed of the airplane in still air
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Downwind DATA:
rate = (p+40) km/h ; time = 3 hrs ; distance = rt = 3(p+40) km
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Upwind DATA:
rate = (p-40) km/h ; time = 4 hrs ; distance = rt = 4(p-40) km
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Equation:
distance = distance
3p+120 = 4p-160
p = 280 (speed of the plane in still air.
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Cheers,
Stan H.
You can put this solution on YOUR website! Let = speed of plane in still air
Let = distance travelled one way
given: (against wind) (with wind)
Since both are equal to , set them
equal to eachother
The speed of plane in still air is 280 mi/hr
check:
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OK
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