document.write( "Question 376132: a forest ranger traveled 1080 mi by jet and then an additional 180 mi by helicopter. the rate of the jet was four times the rate of the helicopter. the entire trip took a total of 5 h. find the rate of the jet. \n" ); document.write( "
Algebra.Com's Answer #267534 by mananth(16946)\"\" \"About 
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a forest ranger traveled 1080 mi by jet and then an additional 180 mi by helicopter. the rate of the jet was four times the rate of the helicopter. the entire trip took a total of 5 h. find the rate of the jet.
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\n" ); document.write( "Let rate of helicopter = x mph
\n" ); document.write( "distance by helicopter = 180 miles\r
\n" ); document.write( "\n" ); document.write( "jet rate 4x mph
\n" ); document.write( "distance by jet = 1080 miles
\n" ); document.write( "..\r
\n" ); document.write( "\n" ); document.write( "Helicopter time + jet time = 5 hours
\n" ); document.write( "t=d/r
\n" ); document.write( "180/x + 1080/4x=5
\n" ); document.write( "...
\n" ); document.write( "LCD = 4x
\n" ); document.write( "(180*4+1080x)/4x= 5
\n" ); document.write( "multiply by 4x
\n" ); document.write( "720+1080=20x
\n" ); document.write( "20x=1800
\n" ); document.write( "/20
\n" ); document.write( "x=1800/20
\n" ); document.write( "x=90 mph speed of helicopter
\n" ); document.write( "jet speed = 4x=4*99=360 mph
\n" ); document.write( "...
\n" ); document.write( "m.ananth@hotmail.ca \n" ); document.write( "
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