document.write( "Question 252179: Tom drives at a constant speed of 60 mph for 6 hours and then at a constant speed of 40 mph for 4 hours. Find his average speed (in mph) for the 10 hours.\r
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Algebra.Com's Answer #183944 by checkley77(12844)\"\" \"About 
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[(60*6)+(40*4)]/10=(360+160)/10=520/10=52 mph. is the average speed.
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