document.write( "Question 1129992: flying against the wind, a jet travels 4020 mi in 6 hours. flying with the wind, the same jet travels 8910 mi in 9 hours. what is the rate of the jet in still air and what is the rate of the wind?
\n" ); document.write( "Rate of the jet in still air:?
\n" ); document.write( "rate of the wind:? \n" ); document.write( "

Algebra.Com's Answer #746634 by ikleyn(52790) $\"\"$ $\"About$

You can put this solution on YOUR website!
.
\n" ); document.write( "

\r\n" );
document.write( "u - v =  = 670 mi/h is the effective speed of the plane against the wind.\r\n" );
document.write( "\r\n" );
document.write( "u + v =  = 990 mi/h is the effective speed of the plane with    the wind.\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "v =  = 160 miles per hour is the speed of the wind.\r\n" );
document.write( "

\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "For your info: the speed of the wind of 160 mi/h is more than the air speed in the eye of a hurricane.\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "The input data in the problem is NOT realistic.\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "------------------\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "In this spot, a real problem from a real student could be placed, who really needs help - instead of these fantasies.\r
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "=================\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "Hello,\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "after posting my solution to you, I got your comment regarding my words \"The input data in the problem is NOT realistic.\"\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "My solution is correct, and these my words are correct, too - there is no doubt.
\n" ); document.write( "It happens often that textbooks have errors/(mistakes).\r
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "In this case, as in other similar cases, you must say \"Thanks\" to me first for I solved the problem for you,\r
\n" ); document.write( "\n" ); document.write( "and then say \"Thanks\" to me again for pointing your attention that the input data is unrealistic.\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "And I really expect that you will do it.\r
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "=================\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "Regarding my words \". . . In this spot . . . \" - it was a joke, obviously.\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "Excuse me, please, if you find it rude.\r
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "

\n" );