document.write( "Question 1101588: you drove for 2 hours at 28 m/s and then took 30 minute break for coffee. you then drove 324 km at 30 m/s. what is your average speed for the entire trip? \n" ); document.write( "
Algebra.Com's Answer #716192 by greenestamps(13216)\"\" \"About 
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\n" ); document.write( "For the first part of the trip, the distance driven was

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\n" ); document.write( "For the second part of the trip, you drove 324km = 324000m at 30m/sec; the amount of time that took is \"324000%2F30+=+10800\" seconds, which is 10800/3600 = 3 hours.

\n" ); document.write( "So for the entire trip, you traveled 100.8+324 = 424.8 km in 2+3=5 hours; your average speed was 424.8/5 = 84.96 km/hr.
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