<PRE><B>Question 808909</B>
plane b is flying 30 mph faster than plane a. find the time is takes for plane b to travel 660 miles if it takes plane a the same amount of time to travel 600 miles. 
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let x=speed of plane a
x+30=speed of plane b
travel time=distance/speed
..
{{{600/x=660/(x+30)}}}
600x+18000=660x
60x=18000
x=300
600/x=2
time is takes for plane b to travel 660 miles=2hrs</PRE>