Question 420204
against wind		5	hours					
with wind		4	hours					
								
Distance = same								
Jet speed	=x							
wind speed	=y							
t=d/r								
10000	/	(	x	-	y	)=	5.00	
5	(	x	-	y	)	=	10,000.00	
5	x		-5	y	=	10000	....................1	
10000	/	(	x	+	y	)=	4	
4	(	x	+	y	)	=	10000	
4	x	+	4	y	=	10000	...............2	
Multiply (1) by 	4							
Multiply (2) by	5							
we get								
20	x		-20	y	=	40000		
20	x	+	20	y	=	50000		
40	x	=	90000					
/	40							
x 	=	2250	mph	Jet speed				
								
plug value of x in (1)								
5	x		-5	y	=	10000		
11250			-5	y	=	10000		
-5	y	=	10000	-11250				
-5	y	=	-1250					
	y	=	250	mph	wind speed