Question 524858
Plane	speed=	x	mph		
Wind 	speed=	y	mph		
with 	wind	(x+y) 			
against 	wind	(x-y) 			
d=	1089		with	Wind 	
1089	/	(x+y) 	=	9	
divide by 	9				
121	/	(x+y) 	=	1	
(x+y) 	=	121	............1		
d=	=	1089	against 	wind	
1089	/(x-y)=	11			
divide by 	11				
99	/(x-y)	=	1		
	x	-		y	=99
add up (1) & (2)					
2	x	=	220		
/	2				
x=	110	mph	speed of	Plane	 
plug value of x in (1)					
we get 	y= 	11	mph	speed of	Wind 
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