Question 872345
Plane	speed	x	mph	with no	wind  			
wind  	speed	30	mph					
								
against	wind  	x	-	30	mph			
with	wind  	x   	+	30	mph			
								
Distance against	wind  	200						
Distance with	wind  	300						
Time = same	equate the time against with time with current							
t=d/r								
200	/(x-	30	)=	300	/(x+	30	)	
200	*(x+	30	)=	300	*(x-	30	)	
200	x  	+	6000	=	300	x	-9000	
200	x  	-300	x   	=	-9000	+	-6000	
-100	x  	=	-15000					
/	-100							
	x=	150	mph