document.write( "Question 1203959: At noon, a cargo plane leaves Ling airport and heads towards Shangxu 500km away at 180km/h. At 1:00pm, a jet takes off from Ling airport and flies on the same course at 450km/h. What time will the jet overtake the cargo plane? \n" ); document.write( "
Algebra.Com's Answer #839899 by mananth(16946)\"\" \"About 
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At noon, a cargo plane leaves Ling airport and heads towards Shangxu 500km away at 180km/h. \r
\n" ); document.write( "\n" ); document.write( "At 1:00pm, a jet takes off from Ling airport and flies on the same course at 450km/h\r
\n" ); document.write( "\n" ); document.write( "Since the jet leaves one hour later , the cargo plane would have traveled 180 km\r
\n" ); document.write( "\n" ); document.write( "speed of cargo plane 180 km/h
\n" ); document.write( "speed of jet = 450 km/h\r
\n" ); document.write( "\n" ); document.write( "They are flying in the same direction\r
\n" ); document.write( "\n" ); document.write( "Effective speed = 450 - 180 = 270 km/h\r
\n" ); document.write( "\n" ); document.write( "catch up time = catch up distance / catch up speed\r
\n" ); document.write( "\n" ); document.write( "time = 180/270 =2/3\r
\n" ); document.write( "\n" ); document.write( "Tje jet catches up after 2/3 hours = 40 minutes.\r
\n" ); document.write( "\n" ); document.write( "The jet will overtake the cargo plane at 1:40pm.\r
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