document.write( "Question 807785: if a bird flies 40km/h with the wind,but only 10km/h against the wind , what is the rate of bird in still air? what is the rate of wind? \n" ); document.write( "
Algebra.Com's Answer #486524 by mananth(16946)\"\" \"About 
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Bird speed =x mph
\n" ); document.write( "wind speed =y mph\r
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\n" ); document.write( "\n" ); document.write( "with wind speed = x+y = 40
\n" ); document.write( "against wind speed = x-y = 10\r
\n" ); document.write( "\n" ); document.write( "solve for x
\n" ); document.write( "2x=50
\n" ); document.write( "x= 25 km/h\r
\n" ); document.write( "\n" ); document.write( "plug x in x+y=40
\n" ); document.write( "y= 15 km/h
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