Question 1030465
Plane  	speed	=x	mph					
wind   	speed	=y	mph					
against 	wind   	6	hours					
with 	wind   	5	hours					
								
Distance with	wind   	2400	miles		distance against	wind   	2400	
t=d/r	against	wind   	(x-y)					
2400.00	/	(	x	-	y	)=	6.00	
								
6.00	x	-	-6.00	y	=	2400.00	....................1	
with	wind   	(x+y)						
2400.00	/	(	x	+	y	)=	5.00	
5.00	(	x	+	y	)	=	2400.00	
5.00	x	+	5.00	y	=	2400.00	...............2	
Multiply (1) by	5.00							
Multiply (2) by	6.00							
we get	2.00							
30.00	x	+	-30.00	y	=	12000.00		
30.00	x	+	30.00	y	=	14400.00		
60.00	x	=	26400.00					
/	60.00							
x	=	440	mph					
								
plug value of x in (1)				y				
6	x		-6	y	=	2400		
2640			-6	-2640	=	2400		
-6	y	=	2400					
-6	y	=	-240	mph				
	y	=	40					
Plane  	440	mph						
wind   	40	mph						
								
CHECK								
x+y=	480							
X-y=	400			+				
2400.00	/	(	480.00			)=	5	
2400	/	(	400	)		=	6