document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=356835>Question 356835</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Trains A and B are going in the same direction on parallel tracks. Train A is moving at 40 miles per hour. Train B is moving at 60 miles per hour. Train A passes a station at 2:15am. If Train B passes the same station at 2:30am, what time will Train B catch up to Train A ? </SPAN>\n" );
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document.write( "speed of A is 40 and speed of B is 60 miles/h.\r<BR>\n" );
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document.write( "relative velocity = 60 -40 = 20 miles/h.\r<BR>\n" );
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document.write( "As train A passes the station before 15 minutes than B, so we firstly find the \r<BR>\n" );
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document.write( "distance traveled by A during this time = 40/4 = 10 miles (15 minutes = 1/4 hour) \r<BR>\n" );
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document.write( "now we find time when B will catch A = distance/speed \r<BR>\n" );
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document.write( "= 10/20 = 1/2 hour\r<BR>\n" );
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document.write( "1/2 hour after 2:30  is 3:00\r<BR>\n" );
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document.write( "so, B will catch the A at 3:00 am.\r<BR>\n" );
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document.write( "  </SPAN>\n" );
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