Question 908938
jet speed	=	450	mph										
wind speed given	=	x	mph										
													
speed against	wind	450	-	x									
speed with	wind	450	+	x									
													
Distance against	wind	1600	miles										
Distance with	wind	2400	miles										
													
t=d/r	time against = time with		wind	-									
1600	/	(	450	-	x	)=	2400	/	(	450	+	x	)
1600	(	450	+	x 	)=	2400	(	450	-x	)			
720000	+	1600	x	=	1080000	-	-2400	x					
2400	x	1600	x		1080000	+	-720000						
4000	x	=	360000										
/	4000												
x	=	90	mph	stream	speed