document.write( "Question 338571: An airplane whos speed through the air is 500 km/h covers a distance over the ground of 1000 km in 2.5 h. How fast was the wind against it? \n" ); document.write( "

Algebra.Com's Answer #242722 by ankor@dixie-net.com(22740) $\"\"$ $\"About$

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An airplane whose speed through the air is 500 km/h covers a distance over the
\n" ); document.write( " ground of 1000 km in 2.5 h. How fast was the wind against it?
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\n" ); document.write( "Let w = speed of the wind
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\n" ); document.write( "Write a dist equation: dist = time * speed
\n" ); document.write( "2.5(500-w) = 1000
\n" ); document.write( "1250 - 2.5w
\n" ); document.write( "-2.5w = 1000 - 1250
\n" ); document.write( "-2.5w = -250
\n" ); document.write( "w = $\"%28-250%29%2F%28-2.5%29\"$
\n" ); document.write( "w = +100 mph is the rate of the wind
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\n" ); document.write( "Check solution find the distance: 2.5(500 - 100) = 1000
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