document.write( "Question 838139: A car travels 60 miles in one hour, stops, travels 120 km in 1 1/2 hours, stops, and travels 60 km more in half in hour. What is the average speed of this car? \n" ); document.write( "

Algebra.Com's Answer #505412 by KMST(5328) $\"\"$ $\"About$

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How long did the car stop?
\n" ); document.write( "Does the problem really mix miles and kilometers, or is that just a typo?
\n" ); document.write( "If those stops were not long, we can calculate as if the car had never stopped.
\n" ); document.write( "In that case, the car would have traveled
\n" ); document.write( " $\"60miles%281.6km%2F%221+mile%22%29%2B120km%2B60km=96km%2B120km%2B60km=276km\"$ in
\n" ); document.write( " $\"1\"$ $\"hour%2B1%261%2F2\"$ $\"hours%2B1%2F2\"$ $\"hour=3\"$ $\"hours\"$ .
\n" ); document.write( "The average speed is
\n" ); document.write( " $\"276km%2F%223+hours%22=highlight%2892%29\"$ kilometers per hour \n" ); document.write( "

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