document.write( "Question 252636: A speed boat traveling 60kph left the port 5 minutes after a fishing boat sailed. If it overtakes the fishing boat after two hours, Find The rate of the fishing boat. \n" ); document.write( "
Algebra.Com's Answer #184657 by drk(1908)\"\" \"About 
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This is an RTD problem. Before we set up the rate x time = distance chart, we need to make sure all units are the same. Notice rate is in hrs and time is in minutes. Turn hours into minutes by using 60. Now for the RTD chart:
\n" ); document.write( "object . . . rate . . . time . . . distance
\n" ); document.write( "speed . . . .1 kpm . . .t - 5 . . . t - 5
\n" ); document.write( "sail . . . . r kpm . . .t . . . . . tr
\n" ); document.write( "total . . .. . . . .. 120min . . . .
\n" ); document.write( "We have two equations:
\n" ); document.write( "(i) t-5 = tr
\n" ); document.write( "(ii) t-5 + t = 120
\n" ); document.write( "we can solve equation (ii) for t as
\n" ); document.write( "t = 62.5 minutes
\n" ); document.write( "We can ow solve equation (i) for r as
\n" ); document.write( "r = (62.5-5)/62.5 ~ .92 kpm.
\n" ); document.write( "The rate of the fishing boat was ~.92kpm or 55.2kph.
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