document.write( "Question 1179659: Flying with the wind, a plane flew 1,120 mi in 4 h. Against the wind, the plane required 7 h to fly the same distance. Find the rate of the plane in calm air and the rate of the wind. \n" ); document.write( "

Algebra.Com's Answer #809275 by MathTherapy(10552) $\"\"$ $\"About$

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\n" ); document.write( "Flying with the wind, a plane flew 1,120 mi in 4 h. Against the wind, the plane required 7 h to fly the same distance. Find the rate of the plane in calm air and the rate of the wind.
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That MUMBO-JUMBO method by the other person is RIDICULOUS! I hope you're not planning on using it. If not, then read on.
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document.write( "Let the speed in still air, and speed of wind be S, and W, respectively
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document.write( "Then we get the following system of TOTAL-SPEED equations:  ====> 
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document.write( "Now, add the 2 equations and solve for S to get the plane's speed in still air.
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document.write( "Afterwards, substitute the value of S into either eq (i) or (ii) and solve for W to get the wind-speed. \n" );
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