document.write( "Question 867155: An aeroplane flying with a wind of 30km/hr takes 40 minutes less to fly 3600 km, than what it would have taken to fly against the same wind.Find the plane's speed of flying in still air. \n" ); document.write( "
Algebra.Com's Answer #522857 by josgarithmetic(39617)\"\" \"About 
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\n" ); document.write( "\n" ); document.write( "r = speed without wind
\n" ); document.write( "t = time to go 3600 km against the wind
\n" ); document.write( "\"2%2F3\" hour = 40 minutes
\n" ); document.write( "Key Idea: RT=D using R rate, T time, D distance\r
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\n" ); document.write( "\n" ); document.write( "________________speed_________time__________distance
\n" ); document.write( "WITH WIND_______r+30__________\"t-2%2F3\"_________3600
\n" ); document.write( "AGAINST WIND____r-30___________t____________3600
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