Question 517045
plane speed	=	450	mph										
wind speed	=	x	mph										
													
speed against	wind	450	-	x								14.07	
speed with	wind	450	+	x									
													
Distance against	wind	1900	m 										
Distance with 	wind	2500	m 										
													
t=d/r	time against = time with												
1900/(450-x)=2500/(450+x	)
1900(450	+x)=2500	(450-x)			
855000	+	1900	x	=	1125000	-	2500	x 					
2500	x	1900	x	=	270000								
4400	x	=	270000										
/	4400												
x 	=	61.36	mph	wind speed