<PRE><B>Question 514233</B>
if you drive to the beach at 50 mph and come back at 70 mph and the round trip was 6hrs what is the distance?
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let x=distance in miles
Distance/speed=travel time
x/50+x/70=6
LCD:50*70
70x+50x=6*50*70
120x=21000
x=21000/120
x=175 mi
ans:
Distance to beach=175 mi</PRE>