Question 194337

{{{AVERAGE_SPEED = (TOTAL_DISTANCE_TRAVELED)/(TOTAL_TIME_TRAVELED)}}}


>>...Jim travels for a half hour at an rate of 20 miles per hour...<<


{{{1st_DISTANCE = (RATE)(TIME) = (20)(1/2) = 10_MILES}}}
>>...Jim travels...for another half hour at an 30 miles per hour...<<
<pre><font size = 4 color = "indigo"><B>
{{{2nd_DISTANCE = (RATE)(TIME) = (30)(1/2) = 15_MILES}}}

{{{TOTAL_DISTANCE = 10 + 15 = 25_MILES}}}

{{{TOTAL_TIME = 1/2 + 1/2 = 1_HOUR}}}

{{{AVERAGE_SPEED = (TOTAL_DISTANCE_TRAVELED)/(TOTAL_TIME_TRAVELED)=25/1 = 25(MILES/HOUR)}}}

Edwin</pre>