document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1154830>Question 1154830</A>: <I><SPAN STYLE=\"word-break: break-all;\"> a plane travels at 100km/h one way and returns at 165km/h the whole trip takes 30mins. how long does it take to on the 1st trip ( 100km/h ) </SPAN>\n" );
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document.write( "The distances are the same, and the ratio of speeds is 100:165 = 20:33.<br><BR>\n" );
document.write( "That means the times are in the ratio 33:20.<br><BR>\n" );
document.write( "Since the total time for the two trips is 30 minutes, the amount of time for the slower trip is<br><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%2833%2F%2833%2B20%29%29%2A30 ALIGN=MIDDLE  ALT=\"%2833%2F%2833%2B20%29%29%2A30\"   DISABLED_style= \"max-width:90%; height:auto;\" > = 18.68 minutes, to 2 decimal places.<br><BR>\n" );
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